Yeah, Yuku's been having server problems again (what else is new) so you may be experiencing disappearing posts and slow loading pages, etc.  Yuku was sold to Inform.com and the old support forums no longer exist - you have to submit a help ticket now whenever you have a problem. 

There is an unofficial support forum, run by a former assistor from the old support.  If you are having any problems, go to Member Support and they may be able to help.  At least give them a try before going the help ticket route.