I had to publish another update (1.2.1) right after I published 1.2.
If you’re installing the app from scratch, then 1.2 would have worked fine for you. However, if you were upgrading from 1.1, then the app would have forceclosed on you since the database wasn’t upgraded.
1.2.1 should upgrade the database when you upgrade the app from the market. If you get forceclose, let me know!