That would be my web page (for fs64), but fs64 is a ken fs, so you couldn't have run the commands you showed on it. I'm puzzled.
It does sound like a time-zone problem. If it's really an fs64 file server, what does "date" print, as Russ suggested, and what is conf.minuteswest set to (usually in /sys/src/fs/<fileserver>/9*.c)?
