Enhancing any piece of software always requires a balancing act: what if the improvements also result in new problems for existing users? Over at APC, I've reported on what father-of-Linux Linus Torvalds had to say on the issue during a session at Linux.conf.au in Hobart. Linux is firmly built on the principle of not incorporating a fix, even for a well-recognised bug, if that fix in turn breaks something else:
