The CardStar loyalty card app is a useful tool that hopes to replace all the store loyalty cards you have in your pocket. They just announced on their Twitter account that they have updated their app to v1.0.6 to fix some BlackBerry bugs.
They have still not fixed my biggest problem with the app which is the fact that the app is a 3.6mb download. From what I can tell that is because all the card images are stored in the app. I just wish they could optimize that by downloading only the images you are using.