Where do you get this? This has nothing to do with hfs ... maybe this is something that has to do with your template and you see it in your browser?
It's definitely HFS
I get this quite often when I go to 'Menu -> IP Address -> Find External Address'
The bad part is when it fails on the first try. But sometimes it works.
I also get ( < ' ) instead of whatever is in there.
img38.imageshack.us/img38/221/scr1249274761.png
It's definitely part of HFS -- It pops up as a dialog box of the hfs242.exe process, and blocks access to the HFS window until I click ok. I checked in WindowSpy and it's a child window of HFS.
The 'Start/Exit -> Find External Address on Startup' fails 100% of the time.
It always says 'Search for external address failed' in the status bar.
..
The reason I recommended the "IP2" program as a good reference is because it's perfect. I've been using it for years and it's never failed ever for any reason. I can't remember it failing even once.