Do you know the class schedule yet (content/type for each class)? It's time to begin planning outfits, and the type of workout will determine which shoes I need, which then helps determine the outfits for each class. Because it's all about looking good... :)
The barbell Cathe uses is 5 lbs, then if you look at the size of her plates, the biggest is a 10 lb plate, medium is 5 lbs and smallest is 2.5 lbs. much different than a standard or Olympic size barbell set. You can usually just eyeball what she is using and know based on these weights.
Jennifer, I was having similar issues with certain DVDs that wouldn't play correctly. When I tried them in a different DVD player, they worked fine. So I just replaced my DVD player and now everything plays great. They at so cheap now that it's no big deal to replace.