@ChrisH
http://www.hafjellbooking.com/sommer/Click on "Overnatting etter plassering", navigate the map a bit, search for a reservation, then after a while the left frame might stop responding.
It just struck me that it might be related to low memory. It was swapping a bit when I was here because I had other hungry tabs open as well.
EDIT: I've seen it on other pages as well, but the one I can remember requires a login. It has a similar layout though, but with a tree structure on the left frame.
Come to think of it, it often happens after opening a richtext editor in the main frame (which doesn't work correctly btw.). The editor accepts text but none of the editor buttons (adjust left/center/right, bold/italic/underline, etc.) work. The submit button also doesn't work and later the outer frames stop responding until I scroll them or click back or something.
Edited by Deniil on 2010/5/25 22:10:05