Missing Xorg 1.9.99 support in guest additions
Binary package hint: virtualbox-ose
Installing guest additions after latest Xorg natty update is not possible:
marco@natty:~$ LC_ALL="en_US" sudo apt-get install virtualbox-
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
E: Broken packages
Checking the VBox' recent code, I saw some updates related to X11; however I don't know if they fix the issue.