If you are using offlineimap on leopard, on an imap connection with ssl (like GMail) and it keep crashing because of the following error:
File "/Library/Python/2.5/site-packages/offlineimap/imaplibutil.py", line 70, in _read return self.sslsock.read(n) MemoryError
you can fix it with this fix:
sudo vim /Library/Python/2.5/site-packages/offlineimap/imaplibutil.py +70
then, comment line 70 and add this line
return self.sslsock.read(min(n, 16384)) #return self.sslsock.read(n)
you can read a description of the bug here.