New flash update breaks Jigidi?

So a week ago my home PC started having issues with Jigidi. The scroll wheel doesn't zoom the puzzle anymore, and if I minimise or alt-tab it sometimes goes (and stays) black. Performance is also a lot worse, shuddering and jerking where it used to be smooth.

I just assumed it was a Firefox issue or the fact that I was generally running a game at the same time.

But now my spare PC is doing the same thing, right after installing a flash update.

Anyone else experiencing this issue?