Under Fedora Core 5, Firefox 1.5.0.4 with Shockwave Flash 7.0 r63 does
not render properly some flash sites.  An example:

  http://www.videotron.com/services/fr/television/illico-a-la-carte.jsp

Notice the text missing near the prices.

Normally I would not report such a problem here, thinking that this
would probably be a problem with Firefox or Adobe Flash...  except that
the same configuration does work on Fedora Core 4.  This leads me to
believe that the problem is probably somewhere else, within Fedora Core
5.  Xorg, Gnome?  Since Firefox and Flash are the same, the problem must
lie elsewhere.  A friend of mine tested the same site on a FC5 machine
(Firefox and Flash version unknown), and he suffered from the same
problem.

On FC5, I tried Firefox 1.5.0.4 provided by the Fedora repository and
a version I downloaded from Mozilla's website.  On FC4, I ran Mozilla's
version of 1.5.0.4.

Attached, screenshot of the above web page for FC4 and FC5.  Same
version of Firefox and Flash.