Obviously it's an issue with VirtualBox. After changing line 415 in the installation file of the GuestAdditions of VirtualBox 2.1.4 from 1.6 to 1.6.* , everything works fine now.
The problems with VirtualBox 2.0.0 Beta mentionned above seemes to be quite an other issue. -- Cannot set resolution higher than 800x600 when running Jaunty Jackalope through VirtualBox https://bugs.launchpad.net/bugs/301028 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs