Differences between Safari for Windows and Safari for Mac

Question

What are the differences from a developer point of view between Safari for Mac and Safari for Windows?

I think it boils down to evaluate differences between (if I missed

Answer 1

A call to java from javascript throws:

java.net.MalformedURLException: no protocol: 
    at java.net.URL.(Unknown Source)
    at java.net.URL.(Unknown Source)
    at java.net.URL.(Unknown Source)
    at sun.plugin.liveconnect.SecureInvocation.checkLiveConnectCaller(Unknown Source)
    at sun.plugin.liveconnect.SecureInvocation.access$000(Unknown Source)
    at sun.plugin.liveconnect.SecureInvocation$2.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.plugin.liveconnect.SecureInvocation.CallMethod(Unknown Source) 

on Safari windows but not safari mac.