I have a sharepoint 2010 box that has anonymous access enabled. One site manager put a document library view on two different pages (insert web part --> lists and libraries --> documents) On one page, they let it display the default view. On the other,
they changed it to display a grouped view (with plus signs, to expand and collapse the list of docs).
The page with the default view works fine. The page with the grouped view asks for credentials when the plus sign is clicked on. If you click cancel, it displays "401 unauthorized".
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