Redcine plays the files back just fine. So, I did some experimenting with exporting quick times, and at first the gray bars remained. And then I changed the crop settings to centre crop and re-exported as quick times then the bars and fuzz were all gone, the videos exported properly. I think maybe these settings were messed up before as well when I previously tried exporting my AvidExport.ale, AAF and MXF files. Do you think perhaps this simple thing could have caused this?