When you mouseover the head branch, you now get a context-sensitive popup for downloading and uploading against that branch.
It is now possible to force-push a remote branch backwards (usually not a good idea to do that, DiffPlug will ask for confirmation first).
git push now includes --set-upstream.
Fixed in this release - general usage
Confirm dialogs which are triggered by the sync pane now automatically have keyboard focus.
Faster feedback when removing a branch or tag from git tips.
"Show help whenever I open a new git history window" was not respected, now it is.
Cloning a git repository could sometimes fail starting in 2.6.0, now fixed.
Deleting remote branches and downloading branches which have been removed from the remote are now fixed.
Attempting to git push and getting rejected because the remote has new commits now proactively prompts to download latest.
Retry attempts which needed a --force were broken, now fixed.
New in this release - expert users
Whenever you see a red X like below, you can right-click it to open a stacktrace dialog. In previous releases of DiffPlug, this was double-click, but now it is right-click. This change was needed to allow us to use the red X as a regular button in some important places, namely the git operation tracker.