You can talk about issues with k-meleon here.
UI Unresponsive During Page Load
Date: March 03, 2001 08:07PM
The UI is totally unresponsive during a page load. This makes the stop button totally useless, for example. It wouldn't be much of a problem if it only affected the current window, but it affects all kmeleon windows; when any one is loading, none of the others respond to mouseclicks or keypresses. The strange thing is this only happens on 2 of the 3 systems I've tried kmeleon on.