I was going to ask the same question.I'm using natural notation, JDK6u12 (i tried jdk6u16 a few mins ago) and Glassfish v3 b62.
I tried adding Jaxb 2.1.11 in my project and setting <class-loader delegate="false"/> but this generates another exception (even if this works its a very ugly solution..)
Thanks for your help.
Jordi
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