Has this issue been resolved? I put up the latest version of the swfupload software, which I was avoiding doing because it was beta. There haven't been any upload errors in ten days, so I wonder if this has fixed the problem.
I also made another update with more bugfixes. You can view a list of bugs fixed by this update at
http://www.shoemakervillage.org/mant...e_status_id=-2.