Pressure Sensitivity with Wacom Bamboo in Inkscape 0.48
Please uninstall the overlay scrollbar package from ubuntu, go into the terminal and type:
sudo apt-get purge overlay-scrollbar
Then rerun Inkscape with the tablet plugged in.
You don't need to uninstall the scrollbar.
Just use the Unity Tweak Tool and disable it from there, in System->Scrolling, by choosing Legacy.