I can confirm a similar issue, I suspect it's the same. It's described in http://sourceforge.net/projects/checkgmail/forums/forum/463626/topic/3405947/
The author fixed it in svn revision 40, I tested it and it seems to work fine now. I would suggest that you try to update to that revision. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org