MimeCheck

  
            License: Freeware $0.00
            OS: Java,Linux,Mac OS X,Unix,Win2000,Win7 x32,Win7 x64,WinServer,WinVista,WinVista x
            Requirements: java 1.5+
            Publisher: Canadian Mind Products
            Homepage: http://mindprod.com
          

check that a server is sending the correct mime type for any given url.

helps you check that a server, possible not even yours, is properly configured.