Try this. Go to settings-manage applications, click on all apps, scroll down to market, click on it, then click clear data. Exit back out, and start the market. It should reset all your market data. Don't know for sure if this will work, but its worth a shot. Remember, you installed a nandroid backup from another phone. Everything may not work right. This is the second thread I've seen with this issue since this method was posted this morning. You may want to go to the thread you got this from and ask the guy who posted it.