administration -> general, choose "housekeeper".
administration -> general again - dropdown is reset to "gui"

broken by :

------------------------------------------------------------------------
r24814 | vedmak | 2012-01-17 10:06:19 +0200 (Tue, 17 Jan 2012) | 1 line

..F....... ZBX-4513 refactored value mappings form

i assume this was caused by changed page name or title, thus value from profiles table is not properly matched anymore