I get the error "Avrstudio has caused an error in OLEAUT32.DLL" with AVRStudio 4.13 beta sometimes when i do Open Project or select a project from Recent Projects.
My system is a Windows 98SE machine and i do C projects (WinAVR-20070122). A stack trace shows that the nearest caller of OLEAUT32.DLL is the AVRGCCPlugin which is called from AVRStudio.
Please ask when more information is required.
My current "fix" is using AVRStudio 4.12 with the parsers from 4.13.