Minor fixes in this hotfix, patch notes are below.

According to a forum post by Amanda "Amary: Fry:

The NA region shards will be coming down to receive 1.3 hotfix #13 tomorrow morning [7/26/11] at 8:00am PDT. The estimated downtime is ** 1 hour **.

UPDATE:  Today's patch may cause you to take a runtime error.  According to Amary, if you get it "you're safe to close it and play. Things may look messy if you do experience a crash later while playing (since the errorhandler's main job is to try and recover things smoothly)". A fix will be coming later today.

See the patch notes below the jump.

GENERAL

• Fixed a case where no group members would have looting rights when a mob died to a reflected ability.
• Resurrecting people who are running back to an instance from a respawn now works more reliably.
• Runeguard notoriety gain from Runic Descent now extends all the way through Glorified.
• Fixed erroneous random data corruption messages that would pop up for no good reason other than scaring people.
• The event mobs Abyssal Runeslayer and Deeptide Pincer will no longer cause epic trains across entire continents. Choo choo!
• Droughtlands: The Ancient Wardstone quest, Nether Say Never, should complete normally.
• Fixed a visual issue with some area effect beam effects not showing as hitting the main target.