Thanks for noticing that :). As it turns out, Artur Czechowski noticed the same issue and patched it in Debian, the patch hasn't made it into the main code yet:
https://code.google.com/p/imms/issues/detail?id=21I'm hoping to help get known issues like this into the mainline code soon, as I think Mag and Artur have not had much time to dedicate to imms recently. berger, would you like to help with the effort?