There are some usual workarounds for KM1.5.x, like trying user agent etc. Take a look in Help>FAQ, or around here in the forum, especially for facebook... But the engine really is getting a bit old now, and not all pages can be worked-around ;-)
The alpha versions still have some bugs, but if you wanna try, try the lastest version from desga:
http://kmeleonbrowser.org/forum/read.php?2,109196
Forum:
General