Browsing the directory produce too many search requests.
Expanding "ou=people" containing 20000 user accounts will produce one search request to get all DNs contained in "ou=people" and !Unable to render embedded object: File (additionally) not found.! 20000 search requests for each founds DNs. Why?!?
The same scenario under Directory Studio 2.x only produce a single search request...
This is easy to observe in the Search Logs of Directory Studio.