git 1.7.8 was released a little over a week ago. You can view the 1.7.8 release notes for a full list of changes.
Most changes will probably not affect your every day use of git, but a few new features should be useful.
via John Kary – git 1.7.8 changes for the everyday developer. Some small but useful changes to Git, git grep now being able to search untracked files in particular is useful.