Help! My framerate is apparently uncapped after patch

[MasterChupon]

So an ancient problem resurfaced after applying the patch, I've got that thing where my horizontal mouselook is suuuuper slow indicating an uncapped framerate. I had this issue when I first installed P99 many years ago. But the framerate cap in my eqclient.ini is still set to 60, and the ingame fps cap setting in the Alt-O options seems to do nothing at all, it shows as capped at 100 when I log in, and even if it I set it down to 10fps the framerate doesn't change.

It's mostly unplayable since patch and I don't want to fry my video card rendering 9000 frames per second, does anyone know something I can try? Or perhaps does anyone know which files from the patch are actually mandatory so I could try reverting everything else back to the old versions?