I think turning off mouse integration in virtualbox helps with the tablet issues. I use virtual box for Photoshop and light wave 3d, and the mouse integration f

I think turning off mouse integration in virtualbox helps with the tablet issues. I use virtual box for Photoshop and light wave 3d, and the mouse integration feature always upset how the program read the cursors coordinates. You just have to remember to use the keyboard shortcut to turn it on again before trying to move your mouse back to a host program.