I use the sort key while in a chest, press it a few times, and then the game freezes, and the 'Memory connection overburdened' message appears. No idea what is causing it, or why it started. I updated a few mods, and this never happened before then. I didn't update Inventory Tweaks, so I have no idea why this is happening.

ForgeModLoader-client.log:
http://pastebin.com/dWV8HY8a
Output-server.log:
http://pastebin.com/RmiQ8Cui

Removing InvTweaks fixes the issue (well duh).

7822d58 should avoid the condition that causes the loop, but may break other things.

Just something I'm going to have to test more carefully in 1.7