I am having an issue with one of our users. Almost all of our users just use the web interface to access Zimbra. On this particular user, if she goes directly into her calendar, it does not show any dates but if she right-clicks on it and chooses to launch it in a separate window, everything comes up fine. This happens on any PC we try using IE and Firefox, but no other users have this issues.
Any ideas on where to look first?
Maybe you could export the calender to a file, and then reimport it as a different calendar to see if you can reproduce the problem in her account.