Yeah if you can give us more symptoms to track this down that will be great as this is the first I heard of it.
I think the bug he was talking about was the bug some people on here on a few threads named the "freecam glitch".
I could be wrong though. You can try to search that and see what you find.
I can tell you all I know about it - One of my friends gets it frequently, but the rest of them, and myself, never get it. While it is a server/bukkit issue, it only effects certain people. Some people commonly, some uncommonly, and some never.
A good example of this bug is nate252's most recent video he put in the media section of the website. At the end of the video, he can't eat food, he can't open chests, but he can type in chat just fine. Suddenly, he is getting hit out of nowhere, and then when he cuts the footage, you can see the guy who killed him picking up his stuff for a bit in a completely different location than his death point.
It appears that during this time, they can chat just fine, but eating, shooting arrows, hitting people, opening chests, and even walking doesn't happen. You are just frozen. The only way to fix it is to relog. (I know because I've seen this issue in places more than just here - places where I can relog and get right back into action. For some reason I get the issue in those places but not here.) Everyone I know who gets the issue has some iffy internet connect, but it's not necessarily their internet going out like normal. They can still chat, browse the internet, see people moving and see their chat too. I think what it might be, is possibly when their internet connection decides to have a little hiccup and comes back instantly, the server just refuses to let them back in properly. That's just a theory though. It just seems that people with bad internet connection get it most, but it's not their internet.