I'm getting this error:

"Your client has issued a malformed or illegal request."

when I embed more than 26 calendars on a web page if the calendars belong to a standard gmail user) or more than 21 calendars on a page if the calendars belong to a google apps user account (from my university).

For each account, the calendars were all created at the same time via the java API.

I'm creating a webapp for my medical school whereby student groups register their calendar urls with my app (I store the calendar ID in a database). Then, the students can view all of the courses and group meetings happening on any given day on a Master calendar (queries all of the calendar IDs from the db and creates the iframe string). There will likely be around 45 to 50 calendars total.

Is there a limit to the number of calendars one can embed into a web page? Is there anyway around this? As mentioned above, I've also tried to create the calendars with a Google Apps username from my university, with the same result.