Jordan Drake and Richard Butler at DPReview recently put the latest Canon EOS R6 firmware update to the test, and what they found is extremely promising. The update more or less solves the overheating issues in "regular" shooting scenarios, and marks a "huge improvement" in overall overheating performance.
Most regular consumers haven't even received their Canon EOS R5 pre-order yet, but the company has already released a major firmware update for the camera. And while Canon doesn't actually SAY it in the documentation, this update does improve both the base overheating and the recovery times.
Canon has released a firmware fix to the dreaded "lock up" issue that has plagued some 1D X Mark III users, making the camera unusable for high-speed shooting. Firmware version 1.1.0, released earlier today, fixes the problem and adds a few additional features at the same time.
A couple of weeks ago, a number of Canon 1D X Mark III users began reporting that their cameras were locking up mid-burst, making them unusable for any sort of high-speed photography. Canon has now confirmed the issue, has found a workaround, and is preparing a firmware fix.
Back in August, it came to light that some of Leica's $7,000 M9 cameras had a problem in which they would corrupt the SD card being used -- a problem that caused one photographer to permanently lose work after a day of shooting.