i guess it couldn't hurt to mention that installing the foundation class libraries can be a little tricky - you can't usually just drop 'em on top of the old one - but you probably knew that. here are a couple more threads on the subject:
http://kmeleonbrowser.org/forum/read.php?f=1&i=1743&t=1732
http://kmeleonbrowser.org/forum/read.php?f=3&i=1404&t=1388