Since I installed the FastPictureViewer codec to handle my RAW and DNG formats, I think that it has also become the default for JPEG files in place of the Microsoft JPEG codec in Windows 7.
I think that this has had the result of causing JPEG file compression to occur whenever Windows Live Photo Gallery writes out metadata into a JPEG file. See here for more background.
Is it possible to set handling of JPEGs back to the Microsoft codec, while continuing to use the FastPictureViewer codec for RAW and DNG formats?
Thanks,
Geoff Coupe