The interface shows that the 'app' drupal must update automatically. It seems that failed because the version still is 7.23-13 (latest version is 7.24). Besides that there is also a message: Update available. I tried updating manually by clicking "Update to 7.23-19 now" link. This also failed and returned this error: Error: No updates found. I had this before and the only solution that worked for me was removing the app and reinstall it, but that's quite devious. I also noticed that my drupal site was broken (missing images, stylesheets, administrative interfaces). My guess is that the update script was started and it failed somewhere, anyone knows why and how to fix this?