As with any report on the Internet, it's been difficult to isolate or quantify the issue, but at least two people on the DVInfo.net forum have reported this problem. One user actually had both his camera, and the FMU unit replaced by Sony, and still had the problem. Interestingly, it seems to be occurring only when doing dual recording (to SD cards and the FMU).
Marshall Levy has been in contact with Sony, and is looking to gather information, specifically:
If you have had this problem with the following:If you have experienced this, you should post to the thread below:
Also note if you're recording in LPCM or Dolby for audio.
- SDHC (HD) only
- SDHC (HD) AND FMU128 (HD)
- SDHC (HD) AND FMU (SD)
DVInfo.net: If you are experiencing the buffering problem, read/post here only
Should you hold off on buying the HXR-NX5U?
At the moment it's hard to say. Definitely more than one person has encountered this problem, though they all seem to be making dual recordings. They also seem to be recording SD to one device and HD to the other. That's totally legal - and actually something Sony promoted with the camera - though from a purely personal point of view it's not something I would be looking to do with the camera.
Ultimately, you probably should wait if you are planning to do dual recording to see how this resolves (is it a memory problem, a camera problem, or a user problem?)