Subsonic 4.7 came out on Wednesday, but I am busy till Friday next Week (09-21-2012). I am afraid to tell you that you can’t expect the new package before this date. As Subsonic is a (java based) program and not just a bunch of web sides like ownCloud it requires some more work. This also is a major release and I don’t want to cause any installation bugs, so I will keep testing it a few days and install, update and deinstall it many times in every possible way, which takes a lot of time (and patience). So relax another Week, 4.7 will definitely come out in September.
btw: DSM 4.1 is running fine on my system.