Phone randomly restarting?

So lately my d2g has been randomly restarting by itself! Any ideas as to why this is happening?

Im running fission 2.4.3 and ive recently (within the past 3 weeks) have installed adw launcher and handcent sms

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Wipe and then reflash. Sounds like something is having problems with something else....

My thunderbolt has been doing same thing past two days.