Hi Andrew, sorry for not getting back earlier. Thought I would receive an email when there was a reply, but should have enabled that now.
I tried your suggestion, but it unfortunately didn't make any difference. Just today I tried updating to the latest Wacom driver as well, but with no luck.
I there is some sort of debug mode or log I can send you, I would be happy to help out. I don't remember having a similar issue in any other application.
Thanks for getting back, and sorry again for my late, late reply.