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Tools->Java Platform Manager, click on tab sources, run ctrl-f11 output in terminal: Componets with potential mnemonic conflict : -component with mnemonic 'J' : Add Jar/Folder Platform Javadoc components with mnemonic conflict are located in different tabs, so there should be no conflict
started ...
Fixed in version 2.4, downloadable from the main page. Now only visible components are checked for mnemonic conflicts.