Bugs in Zoho Calendar

I am unable to use the Calender in my Zoho business account.

username: maddene

Please see attached screenshot for some shots of issues encountering.

1) Cannot change days on the calender
2) The Week/Month views are corrupted (see screenshot)
3) Smart calender entry does not work e.g. "Meeting friday"

I'll be demoing Zoho business next tuesday at a Chamber of Commerce meeting in Ireland as part of launching the product in Ireland. Please help get resolved

Couple of things I tried:
Cleared Firefox Cache and Cookied, same
Same issue on Internet explorer as well