This method is on my list of clients for some wetwork. It seems to me 
that whenever possible we should ask the OS to canonicalize the 
filename and thus checkName... should be improved a little to make use 
of such a prim.

On RISC OS for example there is a nice function that you pass a 
candidate string and a bufffer. You get back the corrected name in the 
buffer, canonicalized against any local dirs, paths, settings, locales 
etc. I imagine a broadly similar api is likely on most OSs.

tim