well this is what happen, and I wasn't blind when I sent this message (when I saw your screenshot I though I was, and when I tried I saw those key and I though damn am I blind or what) so I decide to try to reproduce it and I were able.
it is funny how it screw up, go on m.crackberry.com when it loaded, go on the address bar, and try to type those character at the end of the address, [], see how it bug. then you will not be able to type those [] in the address bar unless you replace the address completly (I know I wasnt blind hehe)