Ever since I installed the new 11.5 Catalyst and Vision Engine, Spiral Knights has been acting weird. Very frequently I get skipping/screen lag. During these lag instances, whatever input that is being pressed, is continually pressed, leading to moving a large distance, or having something typed come out with multiple of the same letter.
I uninstalled AMD stuff and the game ran fine on the leftover driver files, but after removal and a clean install of 11.5 the problem was still there.
I know in order to play the game I'll have to downgrade my drivers, but I'd prefer to find out what exactly is causing this issue.
This is Catalyst 11.5 for sure I think. I've managed to get the driver to reset and other oddities that didn't happen in the past. Try Catalyst 11.2 as it is currently the most recent reliable driver for this game.
Catalyst 11.4 and 11.3 can produce lighting errors, especially around the minerals. Don't use them.