I must've made a mistake either in head.tmpl or in your config-files - all ZAP links to Uppsala are undefined. I suspect it's something on the thin line between
@URL_UPPSALA@ and @URL_UPPSALLA@.
Strangely for Aachen and the Main site it seems to be ok even though I don't remember to have corrected it.
Either way, please try to fix that (and once you found the bug let us now).
Dietmar