Once again, Ben Nadel comes to the rescue with his blog posting, "Content Is Not Allowed In Prolog - ColdFusion XML And The Byte-Order-Mark (BOM)"
It talks about my exact situation with authorize.net ARB XML responses, and the REReplace() example he gives does the trick. Thanks, Ben!!
With a little side of applesauce...
©2006 Shannon Eric Peevey