Logged In: NO

This is the same error as the "error 401" report as mentioned in the below thread.
It has been solved in the lastest svn version.
To update: (In a terminal)

wget http://checkgmail.svn.sourceforge.net/viewvc/\*checkout*/checkgmail/checkgmail
sudo mv checkgmail /usr/bin/
sudo chmod +x /usr/bin/checkgmail

THis should fix it. (Thanks to hotweiss for this!)
Mitch