I've just had an error importing some videos from my Virb Ulta 30 into 5.2.0, but expect it would happen on prior versions. The message was that it could not import the selected files because the "clip library" did not have room (sorry, I don't have the exact wording). So I spent a bunch of time trying to figure out what the clip library was, why it was full, etc.
stumbled into finding that the real problem was that I have so many video file segments in my /virb directory that the whole 500 GB disk is full. Doh.
If the message had simply said "insufficient disk space" I would have saved a bunch of time and effort. I sure wish the error message made sense to a normal Windows user. Is this some lame left over wording from the Mac OS-X version?