AFAIK, a thumbnail image of 160 x 120 is part of the EXIF standard. All other digital cameras (from different brands) that I've seen files from have these.
Having spent the last few days perusing, amongst other things, the EXIF standard, I'm pretty sure that this isn't the case. To quote:
No limit is placed on the size of thumbnail images. Thumbnails are not mandatory, but it is recommended that they be recorded if possible, unless hardware or other restrictions preclude this.
Ok, you're right about that the formal standard allows any size, and other sizes than 160 x 120 do indeed exist. But they're uncommon and I suspect that all new cameras will use what seems to be the informal "standard" of 160 x 120.
anders ------------------------- http://anders.hultman.nu/
