Error: Error while saving e-mail
Ignoring this error message.
If you want, please report the following traceback at www.gmail-backup.com/forum
Thanks! (gmb.py revision 674):
Traceback (most recent call last):
File "gmb.pyo", line 1230, in backup
File "gmb.pyo", line 961, in store
IOError: [Errno 2] No such file or directory: u'z:\\GmailBackup\\2009/02/20090212-074441-rwzehr@gmail_com-Re:_Verification_of_comment_posted:_123445337004548900-1.eml'

I solved this by disable my VPN client.
/Birger