I'm tired of WinZip implementing proprietary compression algorithms, like the ones implemented in the ZIP specification on WinZip 10Amen!
It was a bad idea to extend the ZIP format like they did. For most purposes, the standard zip spec works perfectly fine. There are other formats that can handle very large archives (ALZ, RAR) so that was covered. Adding AES encryption... well... There were already other solutions to the problem of file encryption.
They broke compatibility for a standardized open format, and that just creates pain for users.
It was a different case when RAR was extended because that's a proprietary format. RarSoft is perfectly suited to extend RAR. Joe Blow isn't in a position to extend a well accepted standard. If anyone were to do it, PKWare should have been the one to release a ZIP 3.0 spec.
But when you're big, you get to pretty much do what you want to do. Look at MS and how McAffee and Symantec and Adobe are whining about them. MS gets to do what they want. Nah. That's a bad example. MS is right and the whiners are wrong. GO BILL~!
(And Ray and Steve too!)