Ok forget what i just said. It's your internet thats doing it. I wanted to see if i could give myself the glitch so i terminated my internet so it d/ced me within cabal, then i logged back in and had no guild or buddy list.
Unplug your router/modem for about 5mins and let them sit. When you boot them back up you should have full signal strength. If not right click your network icon on your taskbar and click troubleshoot problems.
~hopefully its solved, if not keep posting and me and sicon will come over and beat your computer with a baseball bat till it works