Skimming digg this morning I found a story discussing a visioning change to the Linux Kernel. Historically odd numbers were development versions and even numbers were stable. The 2.6 Kernel series has been out for five years now.
Greg KH posted a new naming scheme YEAR.NUMBER.MINOR_RELEASE. To me this seems silly. Referring to the kernel as 2.6.22 sounds better. 2.6 is a known stable version. I can see it being very confusing to people to call the kernel 2008-10 or 2008.2.1.