Is anyone else having this issue with their Vulkano recordings that are stored on their Pogoplug drives through iDevice apps??

Everytime I try to play a recorded video through my iPhone (4)/iPad (1), the first couple of frames start to play, and then the Video freezes at that point.  The Audio continues throughout the playing of the file, but the Video never kicks back in.  I haven't had any other problems with video files (that are compatible) with my iDevices, just these that I've recorded through the Vulkano.

Also, the same files play perfectly when I stream from my Pogoplug directly to my TV, so there doesn't seem to be any problems with the recordings.

It's been like this as long as I've had my Pogoplug (9 months or so), I just haven't complained about it until now.  Any thoughts?