Updated release notes for 11-17-2016 shows:
2016-11-17 Removed 372770 and updated 373707 in Resolved Issues.
Has anyone noticed that the updated "Whats new with 5.4.2" document shows a table that says IPS is NOT supported with the fortigate configured in Proxy Mode? That has to wrong... I hope.
Regards to the confusion on upgraded a 60D to 4.5.2 there seems to be a disk issue due to the upgrade to 5.4.0/.1. See 11-17-2016 version of the release notes p13 "Model-60D Boot Issue"
Now to figure out if this is an optional step or if all 60D on 5.4.1 have this issue.
Note: I am excited about the resolved "373251" as the inconsistency of category overrides on reboot has been a nightmare. (nothing like a behavior that is consistent when broken - and then you fix it, and on next reboot it breaks on a new URL)