Conflict with Ajax Events Calendar

The AEC shortcode [calendar] is not displaying properly in a site powered by Montezuma. I am about to try to find the conflict and will post it here if I'm successful. Needless to say, if someone has a clue, please help!

AEC computes column widths with javascript in both the front-end and back-end. The back-end calendar display is working correctly, filling its container with evenly sized columns. The front-end is not so good. The container (center column) is 620px and AEC computes width:70px for the first 6 columns of the calendar. The 7th column takes up the remaining space and appears to be about twice its correct width. I have to figure out why AEC is using a container width of about 500px instead of the actual 620px.

Switching themes fixes the problem, so I'm pretty sure that the combination of Montezuma and AEC is the culprit.

Thanks to anyone who can help or is familiar with this problem.