I was streaming some video using that system (most powerful cpu in the house) and it overheated and turned off. I assume it's fine and not died, just turned off due to the auto high temp shut off. I'll find out later.
It's been very buggy. I don't think it's you or your server I think it's the software version. I hope they can at least get it stable again. I've had to disconnect and reconnect a /bunch/ lately.
I'm sure Ant is relieved that you don't consider him buggy! :P
The main problem is chunk loading, so I'm not convinced that's a plugin issue - seems more like something in the server code itself must have changed to affect that?
Well, unless the /home plugin doesn't properly "warn" the server that the user is arriving (but since it worked ok before that doesn't seem to make sense).