On Macs, the SL_Launcher and Second Life Viewer processes both show as icons on the Dock when running (hover over them to see which is which); this is known bug, and in a future update we'll fix it so they only show as a single icon - we apologize for the temporary inconvenience, but think you'll agree that the performance improvement (quite noticeable on most Macs) is worth it.
Having a 64-bit viewer will help to make your SL experience more reliable and performant (and we have quite a few projects in the queue for this year to that end).
Building the viewer as a 64-bit application gives it access to much more memory than before, and in most cases improves performance as well.
Users who have been running the Release Candidate builds have had significantly fewer crashes.
Discounts on clothings, hair, accessories, decor, and more, plus gifts from many of your favourite Merchants and brands are available from now through February 26th.