Everytime I open a you-tube vid I get this message appear, I then close the message and the video opens as it should 
Any ideas?
Ta
Safari can’t open the page “http://<object%20width="425"%20height="344"><param%20name="movie"%20value="http://www.youtube.com/v/YDKmFipygWY&hl=en&fs=1"></param><param%20name="allowFullScreen"%20value="true"></param><param%20name="allowscriptaccess"%20value="always"></param><embed%20src="http://www.youtube.com/v/YDKmFipygWY&hl=en&fs=1"%20type="application/x-shockwave-flash"%20allowscriptaccess="always"%20allowfullscreen="true"%20width="425"%20height="344"></embed></object>”. The error was: “Cannot show URL” (WebKitErrorDomain
) Please choose Report Bugs to Apple from the Safari menu, note the error number, and describe what you did before you saw this message.

Any ideas?
Ta
Safari can’t open the page “http://<object%20width="425"%20height="344"><param%20name="movie"%20value="http://www.youtube.com/v/YDKmFipygWY&hl=en&fs=1"></param><param%20name="allowFullScreen"%20value="true"></param><param%20name="allowscriptaccess"%20value="always"></param><embed%20src="http://www.youtube.com/v/YDKmFipygWY&hl=en&fs=1"%20type="application/x-shockwave-flash"%20allowscriptaccess="always"%20allowfullscreen="true"%20width="425"%20height="344"></embed></object>”. The error was: “Cannot show URL” (WebKitErrorDomain
) Please choose Report Bugs to Apple from the Safari menu, note the error number, and describe what you did before you saw this message.