I have until recently been able to use the fullscreen functionallity properly, that is the resolution changes to 1440x900 when I go to fullscreen.
No suddenly fullscreen is not fullscreen, it is 1024x768 with black borders around
Any ideas how this happend? 
An other "issue" is that sometimes when I start the VM the resolution is fixed at 800x600 and cannot be changed, but sometimes it can be changed to 1024x768 and sometimes it is 1024x768 to begin with
Not a biggie, just irritating to sometimes have to restart the VM to change resolution.Host OS: Linux Debian testing x64
Guest OS: Windows XP 32bit
Guest RAM: 1gig
Guest Video RAM: 128MB
VirtualBox edition: non-OSE
VirtualBox version: 2.1.4
Guest additions: 2.1.4