So, I just updated to the latest RB, and I'm getting this message now. Code: java -Xmx1024m -Xms1024m -jar /home/minecraft/craftbukkit-0.0.1-SNAPSHOT.jar 151 recipes 16 achievements 04:39:15 [INFO] Starting minecraft server version Beta 1.7.2 04:39:15 [INFO] Loading properties 04:39:15 [INFO] Starting Minecraft server on 192.168.1.62:25565 04:39:15 [WARNING] **** FAILED TO BIND TO PORT! 04:39:15 [WARNING] The exception was: java.lang.NoSuchMethodError: method java.net.ServerSocket.setPerformancePreferences with signature (III)V was not found. 04:39:15 [WARNING] Perhaps a server is already running on that port? Anyone know what's going on? Running off of an Ubuntu 11.04 (Natty Narwhal) box. Never seen that exception before, although I have gotten the server might already be running message. This is definitely not the case. Externally checked the ports and everything. Thanks in advance!