wrote:

Are you sure this is correct?

I don't think so. Documents for Windows 95 and 98 explicitly mention the
comma as an allowed character and NTFS documentation states that since file
names are Unicode, the only reserved characters are ? " / \ * | :
(question mark, quote, virgule or slash, reverse virgule or backslash, less
than, greater than, asterisk, vertical bar, and colon).
--
Brian Tillman