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Dev build. I select some j2seproject, New File, select Java Class. Type in "Foo" as name. Go to Package field. Type "a". An empty package "a" appears in the Packages view! Delete it, start typing something else. Whatever you type in the Package field, such a package is created as you type. Very annoying. Should never ever make any changes on disk before you have pressed Finish.
*** This issue has been marked as a duplicate of 43927 ***