An unhandled exception was thrown: Could not read add-in description

  at Mono.Addins.Addin.get_Description () [0x00000] in <filename unknown>:0 
  at Mono.Addins.TreeNode.ResetCachedData () [0x00000] in <filename unknown>:0 
  at Mono.Addins.TreeNode.ResetCachedData () [0x00000] in <filename unknown>:0 
  at Mono.Addins.TreeNode.ResetCachedData () [0x00000] in <filename unknown>:0 
  at Mono.Addins.TreeNode.ResetCachedData () [0x00000] in <filename unknown>:0 
  at Mono.Addins.ExtensionContext.ResetCachedData () [0x00000] in <filename unknown>:0 
  at Mono.Addins.AddinEngine.ResetCachedData () [0x00000] in <filename unknown>:0 
  at Mono.Addins.Database.AddinDatabase.ResetCachedData () [0x00000] in <filename unknown>:0 
  at Mono.Addins.Database.AddinDatabase.Update (IProgressStatus monitor, System.String domain) [0x00000] in <filename unknown>:0 
  at Mono.Addins.Database.AddinDatabase.Repair (IProgressStatus monitor, System.String domain) [0x00000] in <filename unknown>:0 
  at Mono.Addins.AddinRegistry.Rebuild (IProgressStatus monitor) [0x00000] in <filename unknown>:0 
  at Banshee.ServiceStack.ServiceManager.InitializeAddins () [0x00075] in /build/buildd/banshee-2.2.0/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs:86 
  at Banshee.ServiceStack.ServiceManager.DefaultInitialize () [0x00005] in /build/buildd/banshee-2.2.0/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs:119 
  at Banshee.ServiceStack.Application.Initialize () [0x00000] in /build/buildd/banshee-2.2.0/src/Core/Banshee.Services/Banshee.ServiceStack/Application.cs:80 
  at Banshee.Gui.GtkBaseClient.Initialize (Boolean registerCommonServices) [0x00010] in /build/buildd/banshee-2.2.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:143 
  at Banshee.Gui.GtkBaseClient..ctor (Boolean initializeDefault, System.String defaultIconName) [0x00013] in /build/buildd/banshee-2.2.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:95 
  at Banshee.Gui.GtkBaseClient..ctor () [0x00000] in <filename unknown>:0 
  at Nereid.Client..ctor () [0x00000] in <filename unknown>:0 
  at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (System.Reflection.MonoCMethod,object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
Exception has been thrown by the target of an invocation.

  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) [0x00000] in <filename unknown>:0 
  at System.Activator.CreateInstance (System.Type type, Boolean nonPublic) [0x00000] in <filename unknown>:0 
  at System.Activator.CreateInstance (System.Type type) [0x00000] in <filename unknown>:0 
  at Banshee.Gui.GtkBaseClient.Startup () [0x00000] in /build/buildd/banshee-2.2.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:82 
  at Hyena.Gui.CleanRoomStartup.Startup (Hyena.Gui.StartupInvocationHandler startup) [0x00044] in /build/buildd/banshee-2.2.0/src/Hyena/Hyena.Gui/Hyena.Gui/CleanRoomStartup.cs:54 

.NET Version: 4.0.30319.1
OS Version: Unix 3.0.0.12

Assembly Version Information:

System.Xml (4.0.0.0)
Banshee.Core (2.2.0.0)
Hyena.Data.Sqlite (2.2.0.0)
gdk-sharp (2.12.0.0)
Mono.Addins (0.6.0.0)
atk-sharp (2.12.0.0)
Hyena.Gui (2.2.0.0)
Mono.Posix (4.0.0.0)
gtk-sharp (2.12.0.0)
Banshee.ThickClient (2.2.0.0)
Nereid (2.2.0.0)
DBus.Proxies (0.0.0.0)
System.Core (4.0.0.0)
Hyena (2.2.0.0)
dbus-sharp (1.0.0.0)
glib-sharp (2.12.0.0)
System (4.0.0.0)
Banshee.Services (2.2.0.0)
Banshee (2.2.0.0)
mscorlib (4.0.0.0)

Platform Information: Linux 3.0.0-12-generic x86_64 x86_64 GNU/Linux

Disribution Information:

[/etc/lsb-release]
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.10
DISTRIB_CODENAME=oneiric
DISTRIB_DESCRIPTION="Ubuntu 11.10"

[/etc/debian_version]
wheezy/sid