Currently, NetworkManager will keep older networks around in gconf. While not inherently harmful, it would be nice to have a mechanism for cleaning them out. As a possibility, we could have a 'last used' timestamp and remove ones after a certain time. Needs some thought.
Changing version to correct version bug was filed against. (Some were filed against "test3" when they clearly are for FC3T2, a test for FC3.)
There seems to be a timestamp for each network connection in gconf. Does NM use it to purge old connections ?
NM doesn't purge connections, but latest 0.7 (F8 and rawhide) and 0.6.6 (will be pushed to F7) have connection editors that allow you to manually remove old wireless networks if you so desire.