[iPhone] Cookies in UIWebView not accepted anymore after update to iOS 4.2.1

[guggero]

Hi

I know, this is probably a bug in the iOS update 4.2.1 but I'm posting
here with the hope that someone might have a workaround or fix for the
problem.

I use phonegap to load content from a site through HTTPS with the
jQuery functions $.get and $.post. The site requires a login and
stores the session information in a cookie (with the "secure" flag
set).
This worked perfectly in iOS up to 4.1 thanks to the following code:

NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage
sharedHTTPCookieStorage];
[cookieStorage setCookieAcceptPolicy:NSHTTPCookieAcceptPolicyAlways];

But since i updated my iPhone to iOS 4.2.1 it seems that the UIWebView
does not accept/store the cookies anymore. And therefore the login
does not work anymore.

I cannot change anything on the server. And I would like to avoid the
worst case scenario where I would have to write the HTTPS-requests
myself using NSURLConnection, since that would mean that it would not
be a cross platform solution anymore.

After long hours of googling for a solution I gave up and hope that
someone here could give me an idea how to fix this.
I'm thankful for any hint concerning this topic.

Cheers,
guggero