CC not only cleans Windows MRU keys but also many 3rd party applications. Recently opened/saved files. Open/Save common dialogs. Start>Run. etc. CC cleans 'em.
"If so, perhaps someone from CCleaner should inform the guys at Makeuseof.com as their RSS feed is quite widely distributed."
It wont be me I doubt they would update it anyway. The value of the article is paranoia. Take that away and what would be left?
Thanks very much for your speedy and helpful response. I am pleased my faith in CCleaner has been restored (yet again !!)
On reflection I think I agree with you about letting them live in ignorance.