I have an asp:TabContainer on a form and after the app is re-deployed to the server, the tabs aren't styled. If I take the Webresource.axd URL and try to load it in the browser, I get a redirect to a login page, so it seems like an authentication problem, yet the rest of the app has already been logged in long before you get to the page with the tab control.
A restart of the web server and even a reboot don't appear to affect it.
Then, eventually the styles start working and do not stop working until another deployment, when it usually exhibits the same behavior.
Is there some kind of caching or permissions issue going on?
Here's the authentication from the web.config:
<authentication mode="Forms">
<forms name=".ASPXAUTH" protection="All" timeout="2400" loginUrl="Default.htm"/>
</authentication>