I have a shoot this weekend. I'm waiting until Monday to update my two 7D bodies.


Practically, I'd wait until you had a hole in your schedule where you could be without the camera for the time it'd take Canon to fix it (shipping time, shelf time, bench time, test time, processing time, shipping time - shelf time can be several days if a load of CPS repairs come in when/after yours does), or wait for an equivalent amount of time after release so you can get a solid sense of how others' experiences have gone.


Technically, if I felt the fixes were compelling or urgent for my cameras, you'll find me doing the update as soon as I can put the relevant pieces in the same room (Internet-connected computer, 2GB memory card, card reader, camera).