There are a few weird bugs in my system that I can’t figure out how to fix. I have an Ubuntu (always updated) and Windows 7 dual boot. One of the bugs is that when I reboot from one system to the other, the system time is totally messed up. When I reboot from Ubuntu to Windows, on Windows I get a system time 8 or so hours behind my timezone (I suppose it displays UTC but I didn’t check), and when I return to Ubuntu, I see the other way around: the system time is 8 or so hours ahead of what it should be. The problem is, I have no idea which system is bugged.

Edit: this can be solved by setting the UTC option in /etc/default/rcS to “no”.