Can anyone suggest the right flags to use with the december version of GUIminer and an HD7970?  I am running it on mine, with good speeds, but it will routinely stop working for a second or 2 once a share is submitted, causing my miner to pause until it begins a new share.  I've never seen it do this on my other rigs running 5970's.   

It will give the "warning, job finished, Tahiti is idle" and then jump back to hashing shortly after.