did including the jquery.1.7.1.in.js as header-portlet in the liferay-portlet.xml work for you?
I have tried that but still get porlet temporarily unavailable.
I have users using jquery portlets on 6.0.6 without any problem. The portlets also works on 6.1.0 but 6.1.0 is too buggy for customer usage so I'm still offering 6.0.6 solutions.
Attach your sample project.
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