What this means for developers is that any site which you have built using ‘plug-in’ technology such as Flash, Windows Media Player, QuickTime or Real Player will act differently.

Every instance of plug-in content will prompt the user to click an ‘OK’ button in order that the plug-in can execute content. On some sites this will have a huge impact, other will not be affected.

Macromedia has identified some early workarounds, but these require significant changes to existing site code.

You can find out more about these solutions here: http://www.macromedia.com/devnet/activecontent/