I have never had any problems with hibernate on my Acer laptop. I actually really like it because if I need to switch batteries I can just hibernate, pop the battery out and load it back up. It is a nice feature to have. My laptop actually will sleep then hibernate if it has been sleeping too long... it freaked me out the first time it did it because it was sleeping then all of a sudden the fan kicked on.
I have actually had more problems with sleeping on my G5 than I have with hibernate on my PC.
I read this thread expecting a discussion about a
different kind of hibernate but I guess it wouldn't have really fit in this forum anyways.