I'm running a Dell XPS 15, with Fedora 16 XFCE, CentOS and Ubuntu 12.04 on it. Each on a separate partition, with two more for dedicated data storage.
I found that whenever I switch distros, the system clock mucks up. This is not only with Fedora, but with CentOS as well. I haven't noticed it yet with Ubuntu. Basically, if I reboot from Fedora to CentOS, the system time on CentOS is wrong, and once I correct that and boot back into Fedora, the system time on Fedora is wrong!
I haven't set it to sync over the net, since I'm behind a proxy and I'm not sure how to set that.
Any ideas on how to fix this?