There are multiple issues that can impact Flash at the moment. You must also ensure you are not using "libflashsupport"; see bug #192888 (and from the symptoms you describe, it seems more likely to be your problem).
Browsing the site you mentioned, I see no problems on my systems with the workaround in place *and* libflashsupport disabled. I do see a lot of embedded Youtube videos that can trigger the crash as mentioned in the other bug, though.
Matteo,
There are multiple issues that can impact Flash at the moment. You must also ensure you are not using "libflashsupport"; see bug #192888 (and from the symptoms you describe, it seems more likely to be your problem).
Browsing the site you mentioned, I see no problems on my systems with the workaround in place *and* libflashsupport disabled. I do see a lot of embedded Youtube videos that can trigger the crash as mentioned in the other bug, though.