It means that we have never been able to reproduce the issue neither at BioWare nor at LucasArts (thats about 200 different computer and tester combinations or so).
Since we can't make it happen, we use the description of the issue to try and prevent/fix the symptom of the bug, since we are not able to reproduce or trap the issue in the debugger.
If you have a better suggestion on how to do this, I would love to hear it.
Derek French
Producer, Live Team
BioWare Corp.
Derek French
Technical Producer
BioWare