diff --git a/src/columns/ColDate.cpp b/src/columns/ColDate.cpp
index ebdd3e6e2..0e84c8dd8 100644
--- a/src/columns/ColDate.cpp
+++ b/src/columns/ColDate.cpp
@@ -66,12 +66,6 @@ ColumnDate::~ColumnDate ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnDate::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnDate::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColDate.h b/src/columns/ColDate.h
index a79d7a7ea..0d1876ba7 100644
--- a/src/columns/ColDate.h
+++ b/src/columns/ColDate.h
@@ -39,7 +39,6 @@ public:
   ColumnDate ();
   virtual ~ColumnDate ();
 
-  virtual bool validate (std::string&);
   virtual void measure (Task&, unsigned int&, unsigned int&);
   virtual void render (std::vector <std::string>&, Task&, int, Color&);
 };
diff --git a/src/columns/ColDepends.cpp b/src/columns/ColDepends.cpp
index 4622fbbb7..f051f1d0e 100644
--- a/src/columns/ColDepends.cpp
+++ b/src/columns/ColDepends.cpp
@@ -57,12 +57,6 @@ ColumnDepends::~ColumnDepends ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnDepends::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Overriden so that style <----> label are linked.
 // Note that you can not determine which gets called first.
diff --git a/src/columns/ColDepends.h b/src/columns/ColDepends.h
index e1a72ba0d..a9297db3c 100644
--- a/src/columns/ColDepends.h
+++ b/src/columns/ColDepends.h
@@ -39,7 +39,6 @@ public:
   ColumnDepends ();
   ~ColumnDepends ();
 
-  bool validate (std::string&);
   void setStyle (const std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
diff --git a/src/columns/ColDescription.cpp b/src/columns/ColDescription.cpp
index 2419065a8..abf376db9 100644
--- a/src/columns/ColDescription.cpp
+++ b/src/columns/ColDescription.cpp
@@ -85,12 +85,6 @@ ColumnDescription::~ColumnDescription ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnDescription::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnDescription::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColDescription.h b/src/columns/ColDescription.h
index 49f78e6b5..fdd47f689 100644
--- a/src/columns/ColDescription.h
+++ b/src/columns/ColDescription.h
@@ -39,7 +39,6 @@ public:
   ColumnDescription ();
   ~ColumnDescription ();
 
-  bool validate (std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
diff --git a/src/columns/ColID.cpp b/src/columns/ColID.cpp
index 2c07106ff..ddcda6512 100644
--- a/src/columns/ColID.cpp
+++ b/src/columns/ColID.cpp
@@ -50,12 +50,6 @@ ColumnID::~ColumnID ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnID::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnID::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColID.h b/src/columns/ColID.h
index a2ef7a61a..55cd665be 100644
--- a/src/columns/ColID.h
+++ b/src/columns/ColID.h
@@ -39,7 +39,6 @@ public:
   ColumnID ();
   ~ColumnID ();
 
-  bool validate (std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
diff --git a/src/columns/ColIMask.cpp b/src/columns/ColIMask.cpp
index 623566552..028dba794 100644
--- a/src/columns/ColIMask.cpp
+++ b/src/columns/ColIMask.cpp
@@ -50,12 +50,6 @@ ColumnIMask::~ColumnIMask ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnIMask::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnIMask::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColIMask.h b/src/columns/ColIMask.h
index f0dd89ff4..bab03a7b2 100644
--- a/src/columns/ColIMask.h
+++ b/src/columns/ColIMask.h
@@ -39,7 +39,6 @@ public:
   ColumnIMask ();
   ~ColumnIMask ();
 
-  bool validate (std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
diff --git a/src/columns/ColMask.cpp b/src/columns/ColMask.cpp
index b0e8c893f..a00eb31c3 100644
--- a/src/columns/ColMask.cpp
+++ b/src/columns/ColMask.cpp
@@ -50,12 +50,6 @@ ColumnMask::~ColumnMask ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnMask::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnMask::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColMask.h b/src/columns/ColMask.h
index d0b3e9e5e..b8ef04c99 100644
--- a/src/columns/ColMask.h
+++ b/src/columns/ColMask.h
@@ -39,7 +39,6 @@ public:
   ColumnMask ();
   ~ColumnMask ();
 
-  bool validate (std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
diff --git a/src/columns/ColParent.cpp b/src/columns/ColParent.cpp
index 1d1d0eac3..2cd167cda 100644
--- a/src/columns/ColParent.cpp
+++ b/src/columns/ColParent.cpp
@@ -50,12 +50,6 @@ ColumnParent::~ColumnParent ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnParent::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnParent::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColParent.h b/src/columns/ColParent.h
index 677b51a71..ad2415be6 100644
--- a/src/columns/ColParent.h
+++ b/src/columns/ColParent.h
@@ -39,7 +39,6 @@ public:
   ColumnParent ();
   ~ColumnParent ();
 
-  bool validate (std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
diff --git a/src/columns/ColProject.cpp b/src/columns/ColProject.cpp
index f71b60b39..12574fdc5 100644
--- a/src/columns/ColProject.cpp
+++ b/src/columns/ColProject.cpp
@@ -53,12 +53,6 @@ ColumnProject::~ColumnProject ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnProject::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnProject::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColProject.h b/src/columns/ColProject.h
index 2fe76d1d8..708ee3eb5 100644
--- a/src/columns/ColProject.h
+++ b/src/columns/ColProject.h
@@ -39,7 +39,6 @@ public:
   ColumnProject ();
   ~ColumnProject ();
 
-  bool validate (std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
diff --git a/src/columns/ColRecur.cpp b/src/columns/ColRecur.cpp
index 7e1bd6d71..fb0ce0272 100644
--- a/src/columns/ColRecur.cpp
+++ b/src/columns/ColRecur.cpp
@@ -54,12 +54,6 @@ ColumnRecur::~ColumnRecur ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnRecur::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Overriden so that style <----> label are linked.
 // Note that you can not determine which gets called first.
diff --git a/src/columns/ColRecur.h b/src/columns/ColRecur.h
index bdff9d31e..19c0ea92c 100644
--- a/src/columns/ColRecur.h
+++ b/src/columns/ColRecur.h
@@ -39,7 +39,6 @@ public:
   ColumnRecur ();
   ~ColumnRecur ();
 
-  bool validate (std::string&);
   void setStyle (const std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
diff --git a/src/columns/ColStatus.cpp b/src/columns/ColStatus.cpp
index 01a8d4f52..bceb866f3 100644
--- a/src/columns/ColStatus.cpp
+++ b/src/columns/ColStatus.cpp
@@ -50,12 +50,6 @@ ColumnStatus::~ColumnStatus ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnStatus::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Overriden so that style <----> label are linked.
 // Note that you can not determine which gets called first.
diff --git a/src/columns/ColStatus.h b/src/columns/ColStatus.h
index 5b3c95130..f16f14da3 100644
--- a/src/columns/ColStatus.h
+++ b/src/columns/ColStatus.h
@@ -39,7 +39,6 @@ public:
   ColumnStatus ();
   ~ColumnStatus ();
 
-  bool validate (std::string&);
   void setStyle (const std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
diff --git a/src/columns/ColTags.cpp b/src/columns/ColTags.cpp
index 3416b5db1..fe3e1224f 100644
--- a/src/columns/ColTags.cpp
+++ b/src/columns/ColTags.cpp
@@ -53,12 +53,6 @@ ColumnTags::~ColumnTags ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnTags::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Overriden so that style <----> label are linked.
 // Note that you can not determine which gets called first.
diff --git a/src/columns/ColTags.h b/src/columns/ColTags.h
index 523472d21..ecd8d3716 100644
--- a/src/columns/ColTags.h
+++ b/src/columns/ColTags.h
@@ -39,7 +39,6 @@ public:
   ColumnTags ();
   ~ColumnTags ();
 
-  bool validate (std::string&);
   void setStyle (const std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
diff --git a/src/columns/ColUUID.cpp b/src/columns/ColUUID.cpp
index 80ed98331..9d4aab992 100644
--- a/src/columns/ColUUID.cpp
+++ b/src/columns/ColUUID.cpp
@@ -50,12 +50,6 @@ ColumnUUID::~ColumnUUID ()
 {
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool ColumnUUID::validate (std::string& value)
-{
-  return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Set the minimum and maximum widths for the value.
 void ColumnUUID::measure (Task&, unsigned int& minimum, unsigned int& maximum)
diff --git a/src/columns/ColUUID.h b/src/columns/ColUUID.h
index f67a54fc4..ddf22fd33 100644
--- a/src/columns/ColUUID.h
+++ b/src/columns/ColUUID.h
@@ -39,7 +39,6 @@ public:
   ColumnUUID ();
   ~ColumnUUID ();
 
-  bool validate (std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
 
diff --git a/test/burndown.t b/test/burndown.t
index 683268b24..3aca85d39 100755
--- a/test/burndown.t
+++ b/test/burndown.t
@@ -45,7 +45,13 @@ class TestBurndownCommand(TestCase):
         cls.t("2 start")
         cls.t("add three")
         cls.t("3 delete")
-        cls.t("log four")
+        cls.t("add four")
+        cls.t("4 start")
+        cls.t("4 done")
+        cls.t("add five")
+        cls.t("5 start")
+        cls.t("5 done")
+        cls.t("log six")
 
     def setUp(self):
         """Executed before each test in the class"""