I Have today updated from Webmin 1.690 to 1.700 and now find that the browse button in various modules including the "Create Mount" module causes the following error:
"HTTP/1.0 500 Perl execution failed Server: MiniServ/1.700 Date: Wed, 13 Aug 2014 14:15:16 GMT Content-type: text/html; Charset=iso-8859-1 Connection: close
Error - Perl execution failed
This now happens in all versions of Ubuntu Server including 14.04
I am using Firefox 31.0 to access Webmin.