firstly it is on topic because it is something only occuring since updating to kp48, and was fine in 47. It's like something that changed from 47 to 48 is having an affect.
On another note, having now re-installed just the speedpatch for a few hours there is no reboots, so that looks safe on its own. Although, as a kind of benchmark I tested loading an iplayer video. Before applying speedpatch it was a bit jumpy, afterwards it was still jumpy, perhaps slightly better but not much difference. Before all this (before I removed the patches) an iplayer video was just about perfect.

Anyone else having worse video playback lately?

so, it's getting strangerer and strangerer. lol