[Zope] DTML Calendar tag problem

Hi! I've just installed version 1.0.13 of the DTML Calendar tag on my Zope server. I was trying to build an example page, using this tag, and I noticed the HTML returned is not correctly constructed (a closing table tag is missing or misplaced) and everything looks messed up. Is anyone aware of this bug? kind regards, Vitor Varalonga