Hi Claudia, see if Flash is disabled...
About Safari 5.1.7 and Leopard Security Update 2012-003
Learn about Safari 5.1.7 and Leopard Security Update 2012-003.
Mac OS X 10.5, Product Security, Safari 5.1 (Mac OS X 10.6), Safari 5.1 (OS X Lion)
Safari 5.1.7 for OS X Lion, Safari 5.1.7 for OS X Snow Leopard, and Leopard Security Update 2012-003 disable out-of-date versions of Adobe Flash Player.
Out-of-date versions of Adobe Flash Player do not include the latest security updates and will be disabled to help keep your Mac secure. If Safari 5.1.7 or Leopard Security Update 2012-003 detects an out-of-date version of Flash Player on your system, you will see a dialog informing you that Flash Player has been disabled. The dialog provides the option to go directly to Adobe's website, where you can download and install an updated version of Flash Player.
If you need to re-enable an out-of-date version of Flash Player, you can do the following:
1. Navigate to the /Library/Internet Plug-Ins (Disabled) folder.
2. Drag "Flash Player.plugin" into /Library/Internet Plug-Ins.
3. If the browser is running, quit and restart it.
I installed Mac OS 10.5.8 and found that the Safari upgrade had disabled the Flash plug-in. I went to
and clicked on the click here link for older versions of Adobe Flash Player.
The resulting pop-up window lists Flash 10.3.183.90 for Mac OS X 10.5.
There is a link to this further down:
(Released 7/9/2013) Flash Player 10.3.183.90 (Mac only) (24.4 MB)
I downloaded this and installed it - for which I had to exit all other applications or it aborted with an error half way through.
When I view http://helpx.adobe.com/flash-player.html , I can see the clouds and the tree in the animation in item 5, so I guess it must have worked.