I have the exact same problem with my wacom intuos pro. When I turn GPU acceleration off it works fine.
In Library it does work with GPU turned on.
I have AMD Radeon HD 6500 Series card.
I updated my graphics card driver by installing catalyst 15.8 beta driver last week which enabled me to use the GPU option in LR.
But then I ran into the issue that I could not pan when zoomed in in the develop module.
After I posted my response I updated the Intuos Pro driver to the latest version which seemed to fix the issue; panning now works in 1:1 view BUT when I use spot healing or adjustment brush then panning still doesn't work (holding down the space bar).
So in the end, it's still no solution so I had to disable the GPU option.