If you look at Safari > Window, you'll see the Activity shortcut being command+optionA. So probably it's a change introduced by Apple.

jem cabanes

On 11.09.2011, at 20.50, Þorvarður Davíðsson wrote:

> If you want to download videos from YouTube using Safari you have to open Safari's Activity window (Command+Option+A) and then double click on the entry where the red arrow is
> 
> http://i.min.us/jbkJqzlkJk4dHi.png
> 
> 
> Since a couple of weeks I must additionally press the *Option key* in order to make this work. Is it just me or did Apple recently change the behavior?
> 
> 
> Þorvarður
> OS X 10.6.8
> MacBook Pro 17’'