Normally, a minor update such as this would have been named 1.6.5 (the previous latest version of GWT was 1.6.4), but we did add the value "ie8" to the "user.agent" deferred binding property, which could impact projects using custom deferred binding rules that are sensitive to that property. Thus, we went with GWT 1.7 rather than GWT 1.6.5, to indicate that you may need to pay attention to that change. Details are in the release notes.
In every other respect, this is just a bugfix release, so in the vast majority of cases, the update-recompile process should be nearly effortless.
Download Google Web Toolkit 1.7