I met an error while backing up my gmail,too.

traceback is:
Error: Error occured, full traceback is bellow (gmb.py revision 674)
Traceback (most recent call last):
File "gmail-backup-gui.py", line 109, in _runThread
File "gmb.pyo", line 1235, in backup
File "gmb.pyo", line 427, in handleError
File "gmb.pyo", line 420, in nExceptionMsg
UnicodeDecodeError: 'ascii' codec can't decode byte 0x83 in position 176: ordinal not in range(128)

Traceback (most recent call last):
File "gmail-backup-gui.py", line 109, in _runThread
File "gmb.pyo", line 1235, in backup
File "gmb.pyo", line 427, in handleError
File "gmb.pyo", line 420, in nExceptionMsg
UnicodeDecodeError: 'ascii' codec can't decode byte 0xd1 in position 176: ordinal not in range(128)