iCab Favicons allows you to disable or enable iCab 4 bookmark favicons. This may prove to be useful as this function is not available in iCab. To clean your bookmarks of favicons, simply export them to your Desktop. Next, delete the bookmarks from iCab's Bookmark Manager (Command-Shift-B) and then import the bookmark file from your Desktop. Since this script can toggle the state of the favicons, you can enable them for sites where you want the favicons and disable them for other sites.
Mac OS X 10.4.4 or later