Sensitivity to git-style log messages
With Git, you are encouraged to enter commit messages with a one line summary followed by an empty line and then paragraphs with more detail. (see http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html)
It is then possible to use this subject/body distinction in various other places to make the UI nicer. For example,
git log, Github, and TortoiseSVN's "Show Log" are all sensitive to this format.
It could be nice if Redmine also did this; for example, it could apply different styles to the subject, or show only the subject in the log on the repository index.