i get a pop-up window saying the current version of Safari does not support the community toolbar. How do I get rid of this?

You need to uninstall the Community / Conduit toolbar add-on.

Locate the files in bold print and move them to the Trash. The first five are in your root /Library

/Library/Application Support/Conduit

/Library/InputManagers/CTLoader

/Library/ScriptingAddtions (anything CTLoader realted)

/Library/Receipts/<Toolbar name>.pkg

/Library/Application Support/SIMBL/Plugins/CT2285220.bundle

The next one is in your Home folder.

~/Library/Application Support/Conduit

When you're done, try Safari.