First, I have to say that I'm a big fan of this app. The new release with the cover images is really great. I, too, have had problems with database corruption. After upgrading, some of my series titles were messed up and I couldn't delete them anymore. I read this thread and erased my database to start over from scratch. But after adding the first series, the title would not be show in the main view and I could not delete it anymore. Reading the other posts of people having the same problem, I might have a clue of the root of the problem: the title of the first series I added (in an empty database) contained an '&' character (it's 'Law & order'). Before deleting my database, the series that were messed up and I could not delete also contained an '&' character in their title. I also noticed that Taomyn (who has the same problem) could not delete the series 'Penn & Teller'. I have added a few series (without '&' in their title) and everything is working fine. I hope this can help you jrocha.