Not a lot of things seem to require Shockwave player except jigsaw puzzles. For a long time I thought there was a site problem with msnbc.com regarding their jigsaw puzzle page in that there was never a puzzle displayed and no error messages as to why not. After several emails with their tech support I went to adobe.com and downloaded the latest Shockwave player and installed it. The result was then an error message about the player.
Turns out the only way I could get the puzzles to work was by going to oldapps.com and downloading an older version of Shockwave player (10.3.0.24). Now the puzzles display, but regularly I get notifications that a new version of the player is available. My browser shows that the plugin for Shockwave player needs to be updated as well. When I go to a site that tests the Shockwave player, it fails with any newer version of the player.
To further add to the problem, some sites that offer jigsaw puzzles apparently test to see if I have the latest version of the Shockwave player and pop-up an error notice.