Java 1.5.0 Now Officially Java 5.0
Quantum Jim writes "In a move which out-does Netscape's one-version number skip and Winamp's two-numbers skip, Sun has announced that the upcoming Java2 release will be marketed as version 5.0, skipping three-and-a-half numbers. Can version 6.022E23 be far behind? Thanks to David Flanagan for the heads-up."
Emacs.
... twice, in fact.
Some time ago, the developers realized that GNU Emacs would probably never change its major version number (which is 1). So, after some point, instead of "GNU Emacs 1.x.y", they started dropping the 1 (since it was constant information and therefore redundant). So the current release of GNU Emacs is actually 1.21.3, but it's called "GNU Emacs 21.3".
This actually appears to be what Sun is doing now. They've done it before with Solaris/SunOS