Is it safe to say the issue is eliminated with the 600D?

I've shot up to 1 and 1/2 hrs at approximately 38 degrees Celsius with no problem. The 7d showed the overheat sign in less than 20 min at the same gig.

So my short answer would be "yes".

I have scoured the internet looking for anyone that has had a problem. Up until now I have not had one problem with mine. I have shot outside here in Texas in a 100 degree heat throughout the summer and have not had any problems myself!!! Also, right now it is 109 outside here in Dallas!

Thanks for the responses. I too have searched for any mention of the problem with no success. It looks like the problem has been addressed with the 600D. Now I just hope that Magic Lantern becomes as functional as it is with my current 550D.