Apple has just seeded out the latest developer build of the forthcoming Mac OS X 10.6 operating system, also known as Snow Leopard. The latest build is 10A355, and early reports are that stability improvements are continuing as a trend across the board, while Apple has listed nine known issues in the seed notes for devs to take heed of, including the fact that Quicktime Player X may crash when playing DRM-protected content in 64-bit mode. All recent Apple hardware is now capable of running Snow Leopard in 64-bit mode, and when installed on either the Early 2008 or Early 2009 Xserve machines, 64-bit is the default.

We don’t yet have a firm date for the launch of Snow Leopard, but we are fairly certain that we will hear a lot more about that at WWDC 2009 in June.