I have found that enabling Google Gmail or Calendar Offline mode results in a BSOD if CTM is installed.
I have CTM 2.8.155286.178, and using Firefox 3.5.12.
Whenever I've had this crash, I had to uninstall CTM, then enable Google Offline, then reinstall CTM. After this it all works as expected.
The BSOD gives an error in ctmflt.sys.
As Google Offline mode is a very popular service, please can you investigate this BSOD.