Hmmm this is really odd.
If you still have the tar package for Phoenix 0.5 can you send me the MD5 Sum.
I re-downloaded and installed the 0.5 tar from Mozilla.org, deleted my .phoenix directory and still the browser goes to barnesandnoble.
I'm going to install the same package on another system when I get back to work, but I can't imagine where this would be comming from if it's not within Phoenix.
Strange.. it seems just fine over here.. Really, in every new Phoenix installation, it did say remove .phoenix to clear existing files (back up bookmark.xml or whatever it is called). And restart phoenix.