The title says it all. Visual Studio 2008 sp1 hangs frequently when using the XAML designer (in "view XAML mode", no less).
The problem is random but usually occurs after long editing sessions. The "visual studio is performing an operation" icon appears in the lower right corner when this occurs.
The only remedy is to kill devenv.exe.
A .DMP file generated while devenv.exe was hanging has been generated, and attached to this report.
Every time Visual Studio will hang, I will generate a DMP file and attach it to this report.