I'm having the same problem and can't seem to find any help on the Click to Flash FAQ. The behaviour is the same as described by Galb. It's not related to a specific page: it's every video on Yahoo. I tried white-listing the Yahoo domain in the Click to Flash preferences, but hard to understand really what one should do unless one is an experienced developer, which I am not. Needless to say, I wasn't successful. I'm running OS 10.8.2, Safari 6.0.2 on a late model MacBook Pro 15" with 8 Gb of RAM and a 3.01 Ghz Intel Core 2 Duo with the latest version of Click to Flash. I think it has something to do with Click to Flash/Yahoo/Safari. Safari 6 has been a severely disappointing upgrade and, based on my research on this forum, one is unable to downgrade to Safari 5.