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Starting with build 93 or 94, I could no longer open XML files (i.e. files ending in '.xml') from the Explorer by double-clicking on them. I just get a system bell sound when I do so. Right-clicking on the file, I see a menu that has "Open" greyed out. When I try opening it via File->Open, I get a separate "Explorer" window with 'network' showing up. I'm currently running Build 95.
I cannot reproduce any such behavior using trunk sources. XML files open just fine. If you get a beep and/or Open is greyed out, it *probably* means that you do not actually have focus on the Explorer window, which is possibly a window system bug, but not much use unless there are clear steps to reproduce (especially OS and JDK version). BTW File | Open is not a reasonable way to open much of anything. If it's visible in the Explorer it can and should be opened directly there.
Resolved for 3.4.x or earlier, no new info since then -> verified
Resolved for 3.4.x or earlier, no new info since then -> closing.