Still run. I don't see a bug there.
As to wake up, see if the EVENT VIEWER tells you why it woke. The reason why is not in any clue in your post.
Dell B110 (1110) /XP/160GB/512RAM
When I put the computer into standby mode, with mouse or keyboard set to bring it out, the fan is still running. Is there any way to change this, so the fan will turn off?
I tried going to standby without the mouse/keyboard wakeup setting, but then the computer brought itself out of standby in about 30 minutes(!!)