Wow, I'm seriously bummed out about some of the Gimp 2.8 features that I've been looking forward to since Gimp 2.4 was released. I used to be able to open 20 - 30 jpg files at once, do some minor adjustments, followed by saving each file immediately with the CTRL + S keys. When I try that with Gimp 2.8 the extension is added for me and I'm requested to save as a fresh file with that new extension ... tedious, annoying, and uncalled for since I create my own duplicates en masse if or when I need them.
Granted, I can by-pass that by exporting back to the old jpg file in the original archive ... but then I still have to initiate the export, verify the export, choose a save percentage, and finally close the newly created (???) image that's now appeared in place of my original, in my Gimp workspace.
Maybe I'm doing something wrong here, but I don't think so. It should be possible to tell Gimp which extension to use by default, as opposed to having an extension forced upon you whether you ever use those extensions, or not. Is there some way to make Gimp use the default .jpg or .png extension when I want to save an image, and if so, how? I'm using Gimp with Xubuntu 12.04 and CCSM.