I have several systems running amd64 current and Xombrero runs well on mini-itx boards I have with Intel Graphics that incidently use Kernel Mode Setting. My main desktop uses a Radeon 2400 grahics card and Xombrero has consistently crashed with a "bus error". I also observed crashes in an Sis Video based Desknote that I reverted to 5.3 release.
I wonder if it has anything to do with memory allocation? If I can provide any additional information or run a patch I would be glad to help. -- J. Scott Heppler