WordPress for iOS 2.7 is now available in the App Store. The app has been moved to Core Data, which's a much improved way of managing information locally on the device. Also, the methods used to communicate over XML-RPC have been updated to better handle communication issues and increase reliability of the app.
The Post Editor interface is clenaed up to make it easier to write and edit posts and pages. Simply select the icons along the bottom of the post editor to edit post settings, view attachments and add media. You can also now upload multiple media objects at once!
"Pull to refresh" has been added to the list views of the app. To refresh the list, simply pull down until the arrow flips around and then release.
Also, emails and URLs in the comment view are now tappable so that you can easily get in touch with someone who has left a comment on your site.
If you're upgrading from a previous version of WordPress for iOS, your data will be migrated to the new version. If this doesn't work, you should be able to delete the app and reinstall.