I am having same problem here...
I was trying to root my samsung galaxy s3 by following the instructions here How to root your Samsung Galaxy S3 | Reviews | CNET UK
and now my new phone is stuck in 'firmire upgrade encountered...'
After following the steps on CNET website with Odin3 v.1.85, the process failed. The top left hand corner of the phone says Unsupport dev_type
My phone is with Rogers in Canada.
Can anyone help me?