In typical embarrassing fashion, I've just found my code has the same problem on my PC and it isn't just their GPU. I changed the text drawing to speed it up and was only testing on fullscreen, and didn't test my setup after that it seems. The Setup executable I'm using works though. I don't know if that was an earlier build or what. I'm confused, but at least I have a not-working computer that I can test and fix.
Nasty bitmap font bug : won't draw from backbuffer
Blitz3D Forums/Blitz3D Programming/Nasty bitmap font bug : won't draw from backbufferThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.