That's typical for canon cameras in the past, I cannot speak for Nikons or sonys etc... I've shot warehouse photos for a company in chicago during a 99% humidity day in the summer where temps reached 90+ outside, so inside the warehouses it was hotter... My 30d would only work for about an hour at a time then it would shut off... The warehouses had an A/C office inside and I had 2 cameras so I would have one in the office while shooting, while using the other... when it would stop functioning, I would go back to the office, swap cameras, let the non functioning camera cool down/dry out and by the time my 2nd camera stopped, the 1st would be ready to go again for an hour... It was a pain but it had to be done. Now recently, not to hijack this thread, but I now have a 7D and 5d3 on the way... my 7D i bought about a month after it was released... I shot that puppy in snow storms, rain, etc.. it's been a workhorse... but just recently during 2 paid shoots in the outdoors, no rain/snow, but bitter cold, my 7D would freeze up... numbers on the top LCD remained but camera non functional... I had to remove the battery, reinstall and it would start working again for a short time. I'm not sure if the weathersealing is finally drying out/wearing and needs to be replaced but it never has given me problems in the past when shooting... Any ideas? I plan on using the 7d in reserved backup role when my new 5d3 comes in but curious if anyone else experienced similar things with their 7D's.