Footage from XDCAM not importing into premiere pro

I'm having the same problem… with XDCAM MOV files (50mbps variety from PDW-700 discs) and MP4 files. It sees the audio sometimes, it sees nothing sometimes. I cannot relink because it will only relink the audio. It doesn't matter whether I use the import function of the media browser route. Heck, I can't even import some clips manually because it only imports the audio.