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What was happening on the not-working Macs was that the jdk versions were being used, and the Juniper vpn client won't work with them.
To fix things for the moment I simply removed the jdk folders.
The applet is a simple vpn client from Juniper that lets me access a Citrix Desktop from any Mac that I can install the Citrix receiver client on so I can work on 'Company stuff' from a large screen i Mac when I'm sat at home or from my Mac Book when I'm on the road (it works fine over 3/4G).
All you have to do is delete the middle name of the person in *your* contact card where it is stored as a relationship.I sometimes find the Java setup on my various Apple devices to be a mystery.Recently, I was trying to get a Java applet to run in the same way on 2 i Macs and my Mac Book Air.It's inevitable that older software becomes obsolete, the same way older hardware does.I think the actual hint here is a reminder that if a site misbehaves, changing the user agent can be an effective troubleshooting tool.] Usually I want to open Gmail in Chrome and URLs pointing to my development server in Firefox. There is this nifty free app called Lin Castor that enables you to register your own handler for an URL.