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Product Version = NetBeans IDE Dev (Build 201303192300) Operating System = Windows 7 version 6.1 running on amd64 Java; VM; Vendor = 1.7.0_17 Runtime = Java HotSpot(TM) 64-Bit Server VM 23.7-b01 NetBeans is currenctly offering CSS class names (actually, invalid ones!) as autocomplete for ID attribute. The ID attribute is expected to be filled with unique values, so auto-complete is not even desirable, and if it is offered should warn developers when duplicated.
Created attachment 132871 [details] screenshot of the wrong offer
sounds like a bug, but I believe a fixed one.