I see this problem in Kubuntu 7.04.
Not sure if this workaround is Gnome specific?
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[Dapper LiveCD Beta2] conky flickers
https://bugs.launchpad.net/bugs/42467
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The workaround in Kubuntu 7.04 (adding dbe) works but this also hides
your desktop icons. A better solution is needed.
using the workaround above and also adding these to the conky configuration
file seems to at least solved the flickering for me.
own_window yes
own_window_type desktop
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