I put a custom web part on the home page of our SPS (sp2) site. It
just displays images from an image library on an embedded wss site.
This caused all clients with rights below administrator to get a 401.5
error (repeated login screens), even though these users have the same
rights on the WSS site as the portal.
The webpart assembly is installed in the GAC. The site is in trusted
sites, and displays without a login just fine when the web part is
taken off.
Is this a Kerberos / NTLM problem or something else? Has anyone seen
it before?