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Most importantly, you can now record, upload, attach and play videos within the application. As video becomes an increasingly important part of blogging, this functionality will be invaluable for bloggers on the move.
The new version also features autosaving, meaning you won't lose your entire post if something goes afoul. The setup process for adding new sites to the application has been simplified, and media management has been improved — it's now nearly as good as the functionality in the web app.
Finally, WordPress 2.6 for iOS brings a lot of bug fixes and performance tweaks; you can check out the details about those on the official changelog.
You can install WordPress 2.6 for iOS from the iTunes app store [iTunes link].
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