I am using Virtualbox 2.2.0 beta, it worked well before I upgrade my kernel from 2.6.26 to 2.6.29, but it refused to start my vm just after the kernel upgrade: It said "VMMR0.r0 is importing g_SUPGlobalInfoPage which we couldn't find" in its log file, fortunate enough, I got to this page after I searched the web with this error message, there are already many people who met this problem with kernel 2.