trouble with file_mime_type() in upload.php

Found it, I think! Turns out that I had

extension=php_fileinfo.dll <<<<<<<

I am using php5.6 and you don't need this dll in version of php after 5.3.

I guess there was some kind of conflict going on between the built in finfo code and the finfo code in the dll

Thanks for your help.

proof that an old dog can learn new tricks