Kirk,
Thanks for your detailed reply.
I did not realize that most people keep a consistent number of padding digits in their filenames. It's a decent idea for uniformity's sake, but my feeling is to always keep the filename as short as possible. Also the number of digits has a meaning: if there is just a single digit, then I know that I shot 10 or less pictures; 2 digits means less than 100, etc. Not extremely revelatory info, but it does give me an indication of how significant a shoot was when I'm looking at one picture later on. Also, while generally I shoot hundreds of pictures in a shoot, on almost every CF card I'm taking extra pix of friends, the cats, my son, etc. These odds and ends almost always number 20 or less. So quickly adding a sequence to these would make life easier.
Thanks for the tip about not having to click in the digits box. I don't mind typing at all, I just don't like having to go back and forth with the mouse. If I was a left-hand mouse user, access to the numpad and delete button could better be accomplished with my right hand while my left stayed on the mouse.
Though I do realize it would require more coding, having the sequence digits in the same dialog box, I think is a more elegant solution. It would also make exclusively using the keyboard or mouse easier because you could tab to the sequence digits box.
Anyway, it's a testament to how good and speedy your program is, that I'm able to quibble about such specific UI enhancements. If only the Finder and Nikon Capture NX2 were as responsive as Photo Mechanic!
Paul