Just pop these into your prefs.js file:
user_pref("kmeleon.display.URLbarTitle", "");
user_pref("kmeleon.plugins.layers.title", "");
The first one removes the URL: title from the url bar (if you want to), and of course the second removes the Layers: title.
As for removing the K-Meleon title from the title bar, well you might have to use the program called ResHacker to do this. Do note that ResHacker is more for the experienced user, so be prepared ;-)
http://www.users.on.net/johnson/resourcehacker/