I changed my Python version - but it didn't "take" everywhere?

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http://askubuntu.com – Free Ubuntu-ers. I have a strange problem which I've spent a while trying to debug, and later I searched fairly thoroughly for data on it, without any luck. I have a fairly new server running Lucid Lynx and I'm attempting to switch the default Python version to 2.7. I've tested all the apps that I'm running and they seem to run well on 2.7 - and it's not a mission-critical server, so I can fail and back out if I like. I did my homework, installed 2.7, changed the soft links in /usr/bin, and edited my /usr/share/python/debian_defaults to make the default-version python2.7. Then I tried "py (HowTos)