It works fine for me on Feisty. Does the sidebar not work at all or is it only the metabar that does this?
Could you try removing the sidebard config files in ~/.kde/share/config
** Changed in: kdebase (Ubuntu)
Status: Unconfirmed => Needs Info
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metabar broken in konqueror, 3.5.6
https://launchpad.net/bugs/80880