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1. Go to View menu 2. Slide the mouse over Documentation Indices 3. It will take a while for the submenu to unfold This is because the internal HTTP server module is started when the menu is displayed. The solution should be to lazily initialize the 'u' variable in class IndexOverviewAction.IndexMenuItem. I'll try in a minute whether that will help.
*** This issue has been marked as a duplicate of 39977 ***