after upgrade to iOS6.0 release, ajax login page stopped working. It looks like ajax post request made by jquery $.ajax is cached in safari even after adding random querystring parameter and set Cache-control to "no-cache" (these found on net as solution for cache problem). First login attempt works fine, but after logout at second login request browser don't get any response body from server. only headers.
The same is working in IOS 6 GM and 5 versions and in all desktop browsers.
Any Ideas?
i just read this article at ars technica that seem to be related to your problem. It seems to be an Apple "over optimization" of Safari in iOS6.