I am a long time
Fedora user (since Fedora 6). Previously I have used
Gentoo (for 2 years) and
Slackware (for 5 years).
The thing I liked about Fedora is frequency of package updates + great community. But lately I have noticed that Fedora is becoming too cutting-edge, nay, bleeding-edge. They changed the DNS client to be strict, without any warning, which broke some of their own packages for two Fedora releases. More critically, their LVM modules are not compatible across Fedora 12, 13, 14 (sometimes).
Ubuntu is nicely polished but seems too stable for my liking. Some of the user-space applications are two major version numbers behind (even in
unstable or whatever they call it).
Is there any Linux distro that has the stability of Ubuntu in kernel space and the bleeding edge in applications (especially harmless applications like, say, Stellarium)?