Question: How can I hide links in quicklaunch for special usergroups?
For example only administrators should see administration-links.
I don't even know, if something like this is possible in a simple way or if I'll have to code a webpart for this.

Thanks in advance

Stefan Hennicken

Answer: 
You say 'Farm' scoped feature for the feature, try changing the scope to 'Site' and calling package again.

If memory serves a vis web part normally uses a site collection scoped feature.
Sounds like the Manifest XML for the package is screwed. Use the Feature designer surface to restore the manifest and ensure the merge file is blank (only has the empty tag in).