I got the touchwiz update on August 5, and have absolutely loved it so far. That being said, tonight I sat down to do some school work on my tablet, and the touchscreen stops responding after anywhere from 5-30 seconds of use, every time. If I lock my device, and then unlock it, it works again, but only for a few more seconds. Video and audio still work fine after the freeze(watched a 10 minute youtube video without any issue), but the tab is turned into a video playing paperweight until I lock/unlock it again. Needless to say, this has become extremely frustrating. Does this sound like a hardware issue, or is there anything I can do, short of shipping it in for service? Thanks in advance.