Your BFI suggestion was of course what I should have tried in the first place
![Very Happy :D](./images/smilies/icon_biggrin.gif)
. Just lazy I suppose.
I ended up using TextEdit to fix the encoding. I opened using Thai (ISO 8859-11) and saved as Unicode (UTF-8)
Textwrangler only showed me a subset of encodings.
Thanks very much for the help.