Support Can't delete message thread

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http://androidforums.com – My girlfriend is having an issue where she has a text message thread of over 6000 text messages, but she just tried deleting the thread and it froze her messaging app and proceeded to crash it. Whenever she tries to do that the same thing happens. She's completely stock and she tried installing Handcent and GoSMS to delete but still no go. She's tried clearing data and cache also but no luck. She also can't send or receive texts. Any ideas? I'm on a Galaxy Nexus so I'm not of much use in this matter (General)