Example? Imposible.
I'm testing. I register with a user with this problem, but I work in perfetly. He redirect to home. I cuestion to server (sotem.es). I hope found a solutions because there are more user with this problem. A user with this problem is Argentino with firefox 2.0.0.3 and windows xp sp2. In internet explorer the same problem.
Edit-
A example!! We are 2 admin. He created a 'Go to
ACP' in the menu. He can go in. This link redirect me to index page.
I'm going to activate URL REWRITE!