Until camera makers give us a lot more control over the firmware than we have now (letting us, for instance, select which fields from the EXIF standard we'd like to include -- the copyright field, for instance, is one I'd like to have available, but can now invoke it in Fuji-made pictures only in post-processing), there are certain little irritations that can be problematical. Among these is the naming and numbering of files. (Nikon SLRs let the user specify the three-letter prefix, which is more useful than you might imagine.) Anytime you have two files of the same name on a computer, the potential for conflict, resulting in one file overwriting the other, exists. And it is the kind of thing that's not immediately apparent: let's say we sort our pictures by event, or story, or subject, into separate directories. Fine. No conflict. But then let's consider that in six months or two years we're putting together a CD or DVD slideshow or something. We hit two files of the same name. Oops. Nothing we can do about that now, unless the new Fuji firmware is a lot friendlier than we have reason to expect. But there is (maybe!) a solution. I'm speculating a little here because we don't have the X20 yet. But my thought is that when the X20 arrives, first thing I do after I open it and ooh and aah and charge the battery and set the time and language, is Insert a freshly formatted SD card from the X10 containing exactly one picture (it could of course contain more, but if the whole thing heads south it might ruin them, so I propose to do it with a throw-away picture taken for the purpose of getting its filename). Then, using that card, I would take a picture with the X20. My hope -- and it can only be a hope at this point -- is that the X10 and X20 are sufficiently similar that the X10-formatted card will work and, purpose of the exercise, cause the X20 to pick up the numbering sequence from it. Then, in terms of storage, there would be no overlap of filenames. Make sense? It doesn't solve the dispute between my X10 and my X100; from time to time I do a batch rename of the X100 files -- so they begin "X100-" instead of "DSCF-" -- but that requires that I remember to do so and adds another step to the workflow. I could so that with the X10 files, of course, except that it would drop them to the bottom in the directory . . . Better that Fuji would let us have more access to firmware controls in the first place. Of course, Fuji is not alone in this . . .