This just started for me yesterday or the day before. When I try to download an app from Amazon, I get an error message, "An error occurred while purchasing [app] - please try again." First I cleared data and the cache for the Amazon Appstore app, but that didn't fix it. Then I uninstalled the app and reinstalled it, but that didn't seem to work either. I cleared the phone's Dalvik Cache...no luck. I don't seem to be having any other problems with my Thunderbolt, and my Amazon account seems to be fine. I'm running BAMF SOAB v1.03 on my Thunderbolt. Anyone run into a similar problem or have any suggestions for a fix?