Okay, so after returning to Minecraft, I find myself unable to even move from the platform that I am stranded on without my framerate going to below 0 or something. I was in the middle of an ocean, using a boat, which at times glitches out for me, and as I was going along, the chunks were taking longer and longer to load. I'm at the north outpost on SMP9 in the frontier, and whenever I log in to only SMP9, I'm unable to even move.I've tried logging into a different SMP, and had absolutely no problem with framerate. I've also logged onto other servers other than EMC and had no issues either. I've tried restarting MC, setting the view to tiny, and even restarted my computer. I'm thinking there's probably a file somewhere that I can delete that has to do with what chunks are loaded on the server I join, but I have no idea. I've been running MC with Magic launcher, and the only mods I have are Optifine, Rei's minimap, and McCapes. I've even tried to run it in the official launcher, where it's only Optifine, and that didn't work. Just now I tried to get 1.7.2 to work on my old computer, but MC freezes at the menu.Any clues as to how to get it to be normal again? I'd swim the rest of the distance, but I'm afraid I'm going to lag my way to the bottom of the ocean and drown.