I'm using a Rawhide VirtualBox 4.1.16 guest set up to automatically install guest additions via dkms for each new kernel. My problem is apparently caused by failure of the guest additions to build properly with the 3.5.0 kernel. When it attempts to build (either when I install a new 3.5.0 kernel, or boot into one) it causes the corruption I mentioned. For the time being I've removed dkms in the guest. The next version of VirtualBox will probably have a fix. http://forums.opensuse.org/english/get-technical-help-here/pre-release-beta/475811-re-linux-kernel-3-5-rcx-has-been-released-test-post-your-commentshere-post2467176.html -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel