I've been thinking that it would be a great feature if builder config changes were referenced in a build's history list somehow (balloon with tooltip for example). This can be as useful as VCS change history particularly if there is more than one person who can update the configs.
So for instance a balloon with tooltip could indicate: Ant commandline params was changed. Before: -Dfoo=a, After: -Dfoo=a -Dbar=b
Has this been considered?