Sigma Tel/Vista sound issues

If any of you have noticed a distinct popping noise when you are listening to music or watching dvd's and you are running Vista, chances are you also have the Sigma Tel codec and driver on your computer. As of yet I haven't seen an updated driver from them except from the dell website ( my laptop is an inspiron 1501). I'm not sure if its just on dell computers or if anyone else is experienicing this problem. I've seen a few suggested solutions ranging from disabling the enhancements to outright rolling back to XP. The latter seems to be the only tried and true solution. I will keep looking for posible solutions and keep you posted.