[troyb]

We have a bug on this, sorry for the inconvenience. Another option you can try if you don't want to set a preference for each site and then remove it is to quit OmniWeb, browse to the application support folder: <~/library/Application Support/OmniWeb 5> and remove the "groups.plist" file. This should get you back to an accurate state but you will lose any custom collections (if any) that you've added.