I think you should file a new bug report. I'd guess that you're getting an automated ubiquity crash report so just don't accept it being a duplicate and you should be able to produce a new bug report that will collect crash info.
That is, you should get a list of possible duplicates but there should also be an option to say something like, "No, I need to file a new bug". Then maybe mention that it may be a regression of bug 727842.
I think you should file a new bug report. I'd guess that you're getting an automated ubiquity crash report so just don't accept it being a duplicate and you should be able to produce a new bug report that will collect crash info.
That is, you should get a list of possible duplicates but there should also be an option to say something like, "No, I need to file a new bug". Then maybe mention that it may be a regression of bug 727842.
I hope that helps.