Bad Form?

Ever since I'v started doing back excercise my upper back is always cracking. Has anyone else had this problem? Is it a sign of bad form?
 
what type of back exercises are you doing??
 
Sorry, should of said.
For my upper back, which is where the problem is i'm doing one-arm dumbbell rows, dumbbell shrugs, chinups, and variations on the chinups.
On average I'm doing about 3 sets of 10 reps of each

thanks
 
it might be that the ligaments holding the vertabrates in line are a little lose..
or the vertebrates rotate slightly during the exercises making that cracking sound
 
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