GREAT NEWS!
I do not have any Mac here, so i've never been able to test Safari as needed.
I do know there's a windows port, but it seems it has many issues, and i don't really think that safari on Win is a so relevant percentage. At the end, Safari is Mac browser and should be tested there: if now you confirm that it works with RTD in its own environment, well... that's a great news!!!
Thanks for sharing the info.
Alex