I am using shaepoint 2010 claims\ntlm mixed authentication as described in this link. http://spautomaticsignin.codeplex.com (the user chooses if to authenticate with claims or windows authentication).
I also have another java web application and I want to show a sharepoint page in an iframe.
In all browser except IE I see the mixed login page in the Iframe, choose windows authenticatiion ,enter the credentials, and then get forwarded to the sharepoint page (all inside the iframe). But in IE 7-9 I see the login page in the iframe, choose windows authentication, enter credentials, and nothing seems to happen (can still see the mixed login page).
any idea why this happens and how to fix this in ie?