The commit dialog has been revamped, which now includes more details about the committed files, as well as more useful previous-log selection. Moreover, the sensitivity handling support in VC comparisons has been improved, and the console output for VC comparisons is better formatted, so you can distinguish output, errors and commands.
Meld 1.7.3 also features various minor improvements to the User Interface (UI), such as HIG-ification and better wording for actions, labels and dialogs, user-resizable columns in folder comparisons and version control, a Save All action, and the F5 keyboard shorcut for the Refresh action.