After pulling their v1.3.2 firmware for the Canon EOS 5D Mark IV a couple of weeks ago over unspecified “issues”, Canon has today released a new v1.3.3 firmware to address them. Looking at the list of changes, however, it appears that several bugs have been addressed. Only one is specific to problems introduced by v1.3.2 and a couple existed in v1.3.1.
According to the patch notes, four things were fixed, the first of which was fixed in v1.3.2. In fact, it was the only change made in v 1.3.2, other than apparently introducing a bug that caused the speaker to generate a sound when the power was turned on.