iCal Publish/Subscribe with iCloud

Although I'm not 100% sure this coincided with my iCloud transition, I'm finding that a calendar that I'm publishing to my web site is no longer updating.

Here's the scenario...

1. I have an iCal calendar with my recommendations for live music in the Toronto area. I publish that calendar in the usual manner.

2. I automatically access that calendar from a page on my web site and display it in an iframe. This arrangement allows for updates to my site calendar as soon as I add or remove events from my desktop iCal. You can see it here... http://torontoliveclubhub.com/Club_Calendar/club_calendar.html

3. My latest updates aren't appearing, however, although everything was fine pre-iCloud.

Suggestions?

...Charles