I have had a few occasions where I've properly set the mark in and mark out point for a clip, then gone on to save a few more clips. Then I've used the eject SD card utility in the camera and put the SD card in a PC to copy off the files, but found that one of the clips has a filesize of 1KB and won't play. It's not always the last clip to be saved, so I don't think it has anything to do with not powering off before removing the SD card.
As I've only been running tests so far, it's no big deal but it would be useful to know if a clip has saved successfully on the card or not before flushing the buffer.
Could we have an on-screen message immediately after saving telling us the name, filesize and duration (at saved frame rate) of the file saved?