Since switching to 1.3.1 bukkit builds, I've noticed a huge spike in the memory used by bukkit. My server on the 1.2.5 RB5 build used about 1.5gb memory with no users. Now it spikes up to 2.5gb, which is my limit. I immediately start getting the "can't keep up" messages in the console. I tried disabling plugins but none have really helped. I've turned off some big resource hogs like orebfuscator and dynmap and just left some key plugins running. Regardless, it seems to be a problem with bukkit rather than the plugins. Anyone else experience this dramatic a memory spike or have any suggestions for addressing it?