I have a fairly simple page in WSS3. It's basically a web part page with a custom webpart to display some text and a embedded video from Vimeo, a custom webpart to handle newsletter submissions (a simple form) and a couple of document libraries.
I'm using Forms authentication. My admin user can sign in and browse the rest of the site with no problem, but this one particular page causes the user to be presented with a blank white screen. If I view the source of the page I can see the correct markup and the issue only occurs in IE.
When browsing the site anonymously there is no problem.
Does anyone know what could be causing this?