isopure

I know I have seen this posted before however I cant remember the response: I drink alpine punch and pineapple/banana/orange almost everyday to supplement my food intake-I purchased 2 cases the month of my surgery along with the powder as well--they have an expiration of 10/06 which is months away and as I have been drinking them everything has been fine but when I went to put a few more in the fridge they now all have "floaties"--does anyone know what this is and what causes it as well as if they are still safe to drink? I have emailed the company directly but havent received a response yet and I really dont want to drink them until I know its ok--when I called GNC they told me they should be clear and have nothing floating in them-she then stated they might be going bad--They have been kept in a cool dark place so I dont know how they could go bad months prior to the marked expiration--I appreciate any info that you all may have--thanks a bunch! Lori