AJAX POST Request Only Works Once in Safari 5

Question

I use my own custom AJAX library (I\'m not interested in using jQuery, etc.), which is working flawlessly in the following browsers:

• Firefox 7
• Chrome

Answer 1

The reason the call is failing is because of a bug in Safari when working with Windows Authentication under IIS. Go to the Authentication settings of your website. Right click on Windows Authentication, choose providers and remove Negotiate, leaving NTLM which works fine. I haven't tested Kerberos.

This issue only appears in certain builds of safari.