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Hardy Intrepid Update

Short note: Wanted to make a distribution update from Hardy to Intrepid.
I made a sudo bash and executed update-manager -d from this terminal but this did not show the new version.
Then I have started it with gksu - press ALT+F2 and type in "update-manager -d" - and it was working. This must be a sudo environment issue.
So update-manager -d does not show the new version if started from a sudo session but works fine via gksu or su.
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