Could be bad intonation, or a bad overall setup. Might want to check that?
Current gear:
Carvin CT6M
TC Electronics Dark Matter distortion
Harley Benton 2x12, with Celestion V30s
Laney Ironheart 60w tube amp
fret buzz from what ive seen is generally caused by a few dif things. A) the action is set too low so the string hits frets higher up on the neck. B) fretboard is bowed and the trus rod needs to be adjusted. C) the nut is ****ed up. im not sure how you would fix the nut, but the other 2 are fairly simple. if its the action, simply raise the bridge and then reset your intonation to account for the adjustment. if the neck is bowed, simple crank the trus rod depending on if the neck bows in or out.
See JJ1565 for checking setups and adjustments.
Moving on.....

click the green link in my sig. there's a how to on the first page.

any questions? then post in the thread or back here i guess.

^omg Ken, isnt it so much easier now?

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Set up Questions? ...Q & A Thread

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As mentioned before its generally caused by low action, too much/too little neck bow, etc. Its usually just because the string is hitting somewhere when it shouldnt be and thats causing your buzz.
Ibanez RG7321
Jackson Randy Rhoads V with Floyd Rose
Peavey Valveking 112
Digitech RP70 Guitar Processor