has anyone else had this problem?
I recently upped by virtualbox to 4.2.16 and a yum update on centos 6.4
i found that I had lost all my screen resolutions except 1024x768
I tried to reinstall the VBox guest additions and kept getting 'Unknown X-Windows installation'
After a lot of poking around, I found that selinux had changed from permissive to enforcing and lo, it all works again.
Can something be done to improve the diagnostics in this area? It took me a quite a few hours to find this