The problem occurs when the security features of TGP Brownie are set too restrictive.
I also use TGP BROWNIE which is a fantastic TGP management program, the same program running on easypic.
When you use such a complete powerful program, there is the possibility to over protect.
I have been guilty of over protecting our tgp's.
What occurs is one bad cheating webmaster from a host can have an effect on future clean submissions from the same ip range, name servers, network, etc.
Example, I was blocked from easy pic a couple weeks ago.
my galleries are all neat, simple, with no hidden code ticks.
exaample gallery
http://www.groupiesintral.com/promo/06/
What I encountered was an submission error that told me my whole space on the internet was banned.
What that means is, easy pic has sometimes in the past blocked submissions from my portion of the rack shack network, where my galleries are hosted.
I have found the developer of tgp brownie to be very very helpful in helping us properly setting up the protections the program offers.