Double Calendar Appointments in iFrame

[bwrightuindy]

I've searched the forums and can't find this particular issue. I use the html calendar from Zimbra in an iFrame on a webpage outside of Zimbra. It worked fine last semester, but now the webpage is pulling a duplicate set of appointments. And they're a day off--the appointments show up correctly and also one day later. This only seems to occur with all day appointments. I've tried using a different Zimbra calendar in the iFrame with the same results. We're running 6.0.4_GA_2038.RHEL5_64. As I said, this just started happening as far as we know.

I just discovered that the same thing happens without using an iFrame and merely viewing the html calendar in a browser.

Any thoughts? Thanks in advance.