No. Infact its a occassional problem as i called Sony about it. One of the people i was speaking to on www.PS3trophies.org said they lost their whole friends list. A close friend on my friends list told me he hadn't seen me online and i hadn't seen him online either and for some reason we weren't on eachothers friends lists. Sony aren't sure what the problem is but the only solution is to just readd the missing ones.