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Since the launch of OS X Mavericks last week, many users have been reporting widespread, various, consistent issues within Apple’s bundled Mail application.

Many of the issues have mainly affected users of Google’s Gmail email service, and some of the issues have to do with receiving messages, sorting messages into folders, and deleting messages.

Apple is aware of the issue and is testing a fix for the problem…

An updated Mail application has been seeded to both Apple employees internally and testers within Apple’s customer AppleSeed program.

The updated Mail app is Version 7.0 and is labeled as build 1822. The OS X Mavericks 10.9.0 Mail app, for comparison, is Version 7.0 with build number 1816.

Apple tells testers that the update fixes issues with Gmail, smart mailboxes, and overall stability. Apple also asks these  users to test for the following:

– Use Mail with your usual Mail accounts, including iCloud, Gmail, Exchange, etc.
– Send Mail messages
– Receive and check for new Mail messages at the intervals you expect it
– Read and move Mail messages to folders on your mail server, folders on your Mac, smart folders.
– Delete Mail messages as appropriate
– Undo move or delete actions with your Mail messages
– Mark messages read/unread in both your mail provider’s webpage and Mail and verify they stay in sync.

The updated Mail application is available as a patch download, not as a full update to OS X Mavericks. Sources say that OS X Mavericks 10.9.1 is already well into development, but it is unclear if these Mail fixes will be available as a standalone update or rolled into that upcoming OS X Mavericks 10.9.1 release. Apple asks testers to provide feedback through a dedicated communication channel, and the company refers to this update as “important.”

Update: Seeded to AppleCare employees:

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