Tag auto-complete is an excellent feature, but, if the user does not use the auto-complete suggestion, the typed capitalization should be preserved. For instance, I have a tag "MMS." If I start tagging a note with "maintenance," auto-complete first suggests "MMS." As I continue to type, this suggestion is withdrawn, but the capitalization of the suggestion remains. So, I end up with the tag "Maintenance" rather than "maintenance." This becomes more annoying when the first two letter match. For instance, I have a tag "MAG" and want to tag with "maintenance." The result after auto-complete makes suggestions is "MAintenance." The auto-complete should definitely preserve existing tag capitalization if I use an existing tag. If I tag "mag," it should substitute "MAG," but it should respect typed capitalization if I type a new tag rather than using the auto-complete suggestion. I know this behavior occurs with the Mac client, but I am unsure which other platforms this applies to.