IIS reset fixes this issue temporarily.
Microsoft has a hotfix for this. http://support.microsoft.com/kb/975410/
It applies to:
Microsoft ASP.NET 2.0
Microsoft .NET Framework 2.0 Service Pack 2
The hotfix would replace the following file with the following attributes. For all supported x86-based version and x64-based versions of the .NET Framework 2.0 in Windows 7 or in Windows Server 2008 R2
File name File version File size Date Time Platform
System.drawing.dll 2.0.50727.5652 626,688 11-Feb-2011 23:31 x86
Microsoft has a hotfix for this. http://support.microsoft.com/kb/975410/
It applies to:
Microsoft ASP.NET 2.0
Microsoft .NET Framework 2.0 Service Pack 2
The hotfix would replace the following file with the following attributes. For all supported x86-based version and x64-based versions of the .NET Framework 2.0 in Windows 7 or in Windows Server 2008 R2
File name File version File size Date Time Platform
System.drawing.dll 2.0.50727.5652 626,688 11-Feb-2011 23:31 x86