you get this strange file naming if the mem-card is in a windows format, & you read it in mac, plus you save something from a mac with mp3 file onto a mem-stick i found a similar problem & it seems the resource fork appears as independent file but with the first letter replaced by a _ (underscore) that means that file cannot be used & has small size aswell...
reformatting the card may solve the problem.....
also do not format on a mac, use the camera or a dark-side machine....
cheers James


On 13/11/2006, at 13:21, Mark Secker wrote:

Anyone seen this - can't find a reference in the Canon manual for what would have caused it or how to fix it:

I noticed about a few months ago that on my Canon 20D camera the image file names are now coming up on the card as

"_mgXXXXXX.CR2" and "_mgXXXXXX.jpg" instead of "imgXXXXX.cr2" and "imgXXXXX.jpg"

maybe coincidentally that was at the time I set it to shoot simultaneous RAW & JPG but changing it back has no effect.

not machine dependant as CF cards put in both WIndows and Mac machines come up with this new name format

not a big issue but annoying none the less.

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Mark Secker Computer Support Officer
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