Members page appears to have a probelm

Hi SI team

The page here:

http://www.paurray.de/registered-members

Works as such.

But as soon as I try to re-order/change view or search...

Things break.

i.e searching starts but nothing is found...

please advise

thanks

Paul

PS Just noticing something weird the URL should read

http://finalbug.net/registered-members

but some times switches to

http://www.paurray.de/registered-members

Now I am really confused!!!