Many thanks for the response.
I followed the advice to install Java 7 update 15 and again this tells me it has installed correctly.
I have reloaded safari (and cleared the Java caches using OnyX) but Java still reports a plug in failure (rather than a missing plug in) when trying to view the Oracle Java test page.
If I try to access the Java control panel in System Preferences as is also suggested I get a Problem Report of:-
Java Control Panel quit unexpectedly while uing the libjvm.dylib plugin.
If you have any suggestions of what I can try next I would be gratefull.
Thanks again for your reply, I don't quite understand how a clean install of OSX, software updates and the installation of Java 7u13 then after a week Java 7u15 would not work - but it does not.
I have followed the steps to revert to apples maintained Java 6 and am using this instead.
Thanks for you time and consideration in posting a reply.
Don't know what else to tell you. I've both and show these when running the appropriate command in the Terminal:
For Java 7
/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java -version
java version "1.7.0_17"
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
For Java 6
java version "1.6.0_43"
Java(TM) SE Runtime Environment (build 1.6.0_43-b01-447-11M4203)
Java HotSpot(TM) 64-Bit Server VM (build 20.14-b01-447, mixed mode)