I currently run the GFF Servers (vanilla) and while I'm not entirely sure that I want to move to bukkit, I would like to know that if I did that these crashes would stop. FOR THOSE OF YOU WHO AREN'T FAMILIAR: There is an exploit that some hackers use to crash servers instantly, it is NOT a piston bug, related to spamming, an inherent server issue, an internet connection issue, a hardware support problem, a ddos (though it is commonly called that) ping flood, SYN flood, RST flood, or anything else not related to the minecraft itself. It is an exploit of the minecraft server code that causes it to go non responsive, and 100% cpu usage. I know there are ways of crashing servers by forcing them to try to generate map faster than the machine can handle, by exploring too fast. This MAY be my problem, but flying isn't enabled on my server and players are usually kicked for trying to super run through solid structures, so I'm not sure about that. According to MCP's decompilation of the craftbukkit source, it is identical to the vanilla server source (probably an MCP thing, doesn't seem right) so if it isn't built in to bukkit I want to know what plugin I should get to keep this from happening.