I noticed that an exception is thrown when the CL_GUIWindowManagerTexture process() method is run for the first time. This happens in my own application and in the ClanLib examples as well. It's caught and handled somewhere so the app doesn't crash, but I get this notification in the debug output:

First-chance exception at 0x7750c42d in GUI_Texture.exe: Microsoft C++ exception: CL_Exception at memory location 0x0021e378..
Is this a known issue? I'm using ClanLib 2.3.7. I think it has been happening for ages, but I haven't paid much attention to it.