After installing the 64 bit version of Ubuntu on my Dell Inspiron 1420n I found that the USP (Ubuntu System Panel) keybindings do not work. This is because the /usr/lib/python2.4/site-packages/usp/plugins/_keybinder.so is compiled for a 32 bit system. After a little searching I found out that Glipper includes a _keybinder.so file. After replacing USP's _keybinder.so with Glipper's version, the keybindings worked fine.

  1. Download glipper aptitude download glipper.

  2. Extract the glipper deb with dpkg-deb -x glipper_1.0-1ubuntu1_amd64.deb glipper (change glipper_1.0-1ubuntu1_amd64.deb to the name of your file).

  3. Copy in the new _keybinder.so with sudo cp ./glipper/usr/lib/python-support/glipper/python2.5/glipper/keybinder/_keybinder.so /usr/lib/python2.4/site-packages/usp/plugins/_keybinder.so.

  4. Restart USP with killall gnome-panel and your USP shortcut keys should now work.

Edit: This is no longer necessary.