On a MOSS 2007 environment we receive an error stating "Name cannt begin with the '1' character, hexadecimal value 0x31. Line 1, position 5764." when any user clicks on the My Settings link (or navigates to the page http://sitecollection-url/_layouts/userdisp.aspx?Force=True&ID=USERID&Source=http://somsource). This error occures on just one sitecollection in the entire web application.
Unfortunately there is no entry neither in the ULS log nor in the event viewer, which makes the resolution of this error quite complicated. The hidden user list can be viewed normally except links pointing to userdisp.aspx?Force=...! Since we had problems with the site cache output log, we de- and reactivated already the Publishing Infrastructure site collection feature, which solved the site collection output cache problems but not the My settings issue.
Does anybody have a reasonnable hint on what we could do to get this error fixed? Thank you so much!
Dave