I think the 'Development Update' Post covered all that pretty much. There are a few bugs in the Mozilla code and they'll have to wait until the Moz developers fixed those, that's not in the hands of the KM-team. They want 0.7 to be as bug-free as possible and I can understand why - and appreciate that - they're waiting for that fix.
http://kmeleonbrowser.org/forum/read.php?f=1&i=3556&t=3556