try again. It worked fine for me just now.
"Be conservative in what you send; be liberal in what you accept." -- Postel's Law
"tacos" -- Cactus' Law
"t̥͍͎̪̪͗a̴̻̩͈͚ͨc̠o̩̙͈ͫͅs͙͎̙͊ ͔͇̫̜t͎̳̀a̜̞̗ͩc̗͍͚o̲̯̿s̖̣̤̙͌ ̖̜̈ț̰̫͓ạ̪͖̳c̲͎͕̰̯̃̈o͉ͅs̪ͪ ̜̻̖̜͕" -- -̖͚̫̙̓-̺̠͇ͤ̃ ̜̪̜ͯZ͔̗̭̞ͪA̝͈̙͖̩L͉̠̺͓G̙̞̦͖O̳̗͍
I keep forgetting that PHPWiki does not allow usernames with consecutive CAPS in them (such as mine). That is probably the reason why it gives that ambigous error.
I used to have the same problem as you, but I don't have capitals in my username.
My solution was to turn off cookies for .archlinux.org and then restart konqueror. Maybe this works on other browsers too?
I found this thread and this one. I'm getting the same
Fatal error: Cannot instantiate non-existent class: file_passwd in /home/judd/public_html/lib/WikiUserNew.php on line 2122
and none of the suggestions work for mozilla, lynx, or dillo. Is my user account here valid for there? But, either way, it should do something a bit more optimal, especially after all these months.