"marnen: This app is far easier to use than Onyx if you only want to clear Safari's icon cache"

Launch Onyx, check the box 'Bookmark Icons' under the 'Cleaning' tab, press 'Execute'
...how hard is that? :)

Although I get your point re: needing admin access with Onyx...

This app is far easier to use than Onyx if you only want to clear Safari's icon cache. Also, unlike Onyx, it can be run from a non-admin account.

Onyx does the same, so if you already have that, you don't need this