Found the problem in 7.086, semi duplicated in 7.090 both using IE 6.
Click Path:
Filter Assignments > New Filter Assignment > Click green + sign to add a user.
Make a typo when repeating password.
“Password does not match repeated input” error pops up but there is no way to close the message. Drop down field from behind is appears rendered within the error message. Once the Create new filter assignment is closed then the dialog box appears as it should. (7.086) Once the Create new filter assignment is closed then the dialog box appears as it should.
Better in 7.090 as the OK button was not hidden, but the rendering of the message is still incorrect.
Thanks,
Chris