Over the last weeks, I noticed that the Bamboo app become quite buggy. Buttons refuse to work all of a sudden, like undo, or switching pens. Switching between apps (or even going halfway a switch) seems to solve the issue, but it is annoying you have to do that several times when you are drawing. It also tends to rotate 90 degrees and appear only as a screenshot rather than a fully functional app- which is clearly a bug, as it normally would only allow 180. Can we look forward to an update shortly?