IPhone 4 does not really support MJPEG?

iPhone 4 tech specs claim that it supports Motion JPEG videos.
However, *iTunes refuses to copy any MJPEG video to my iPhone 4*. If I try to drag them, it says "<file> was not copied to the iPhone <name> because it cannot be played on this iPhone". If I sync a photo folder with "Include videos" checked, it just ignores those videos.
The videos are in exactly the format listed in the iPhone tech specs: "Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format".
They play perfectly in both QuickTime Player and VLC. QuickTime movie inspector says they are "Motion JPEG OpenDML, 1280x720, Millions; u-law 2:1, Stereo, 44.100 kHz", frame rate 30.00 fps.
All of my software is up to date. iPhone 4.2.1, iTunes 10.1.1.4, QuickTime 7.6.9, Windows XP Pro SP3.
I've tried smaller video sizes (640x480). I've tried both dragging and syncing. No joy. MPEG4 videos transfer no problem, but not MJPEG.
What's the deal? Does my iPhone 4 really support MJPEG videos? If so, how the heck can I transfer them?
I hate to say it, but MJPEG support is looking like blatant false advertising by Apple.

cls24 -- Click on the "iPhone" tab at the top of this page, then the "Tech Specs" link at top right. Voila. MJPEG support. This would be very handy if it worked since our cameras shoot both high-def and standard-def MJPEG.
Monty1945 -- It would be very helpful to know:
1) Exactly how did you transfer your "old M-JPEG files" to the iphone?
2) Exactly what file format (eg avi, mov) and video/audio codecs (use Movie Inspector in Quicktime Player) did those files use?
Otherwise, I have to assume you are remembering incorrectly, because I have tried MANY different combinations of codecs, formats, and fourCCs to get this to work. It simply doesn't.
Has anyone else tried to put their MJPEG videos on their iPhone 4, and found that it doesn't work?
Thanks.
J

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