I know it sounds like a silly question, but if you go into the PVR option from the menu, and you select "Storage" (right most option), is ANY of the available storage options selected ? Just curious, because if I remember correctly, I don't think that by default anything is selected. And not sure how it would react. Just thinking out loud
EDIT: Funny.. I know I had it worked for me at one point.. But right after I posted the above, I picked up a spare Sandisk 32GB USB stick I had, and could not get it to record on the stick. I tried fromatting in FAT32, exFAT, and even NTFS. Also tried formatting directly on the buzztv (which actually also formats as FAT32). Even tried recording to internal storage. In all cases, I got same reaction. It goes through the recording process. Then when it is done, the PVR menu does show it as a recorded event.. But when you try to play it, it says that stream not available. So looks like an xml file containing the metadata is updated, but the media files themselves are for some reason nor stored.
I checked the key after on my laptop, and there was no files created.. Yes the pvr/1/channels or whatever it is directory is created, but it is empty.
I don't use the PVR functionality, so it is not an huge issue for me, but it is strange. I know I had tested it successfully at one point.