Why can't my colleague assign issues to any other users?

Question

A number of my colleagues recently stopped being able to assign issues to any other users.  When they start typing a user name, it appears in the drop-down.  When they select the username, they get an error message "user does not exist".  Other users do not have this problem.  They are using IE8.

Nick Mason · Answer

It was indeed a known issue, but it's been resolved now. :)

John Macleod · Answer

Trouble is, it's a client and they can only use IE8.  Will investigate the known issue.  Thanks.

Jobin Kuruvilla [Adaptavist] · Answer

I think this is a known issue in onDemand, with IE8. Don't remember the issue key.

People were able to try again and it went through. Other browsers were working fine.