In ZD 7.0 beta on 64 bit Windows 7 the mini-calendar in the lower left hand corner seems to be positioned too low, so that the bottom row is actually cut in half and hidden by the window border. In the Linux version it looks normal however.
Apologies in advance since this topic should probably be in some other forum, but I couldn't find a 'report minor issues' forum.

The 'Error Reports' forum seems to be only for forwarding error reports from the program, judging by its description.