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Any compelling reasons to perform a "do-release-upgrade"?

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linux-howto

http://askubuntu.com – I recently performed a "do-release-upgrade" on one of my company's development machines to go from 11.04 Ubuntu Server to 11.10. The process actually downgraded a custom PHP installation and I had a heck of a time getting the dependencies right to recompile to the newer version. That said, I'm a little hesitant to perform the upgrade on our production machine. I then got to thinking, I want to keep up to date on software updates and security fixes, but do I really need to upgrade Ubuntu releases? Wikipedia roughly describes a Linux Distribution as a certain kernel combined with a set of softw (HowTos)