@Jonas: issuing the following commands in a terminal should fix the issue for you:
gconftool-2 --type=int --set /desktop/unity-2d/launcher/hide_mode 2 gconftool-2 --type=bool --set /desktop/unity-2d/launcher/use_strut false
@Jonas: issuing the following commands in a terminal should fix the issue for you:
gconftool-2 --type=int --set /desktop/ unity-2d/ launcher/ hide_mode 2 unity-2d/ launcher/ use_strut false
gconftool-2 --type=bool --set /desktop/