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1. Download and unzip glassfish-3.1.2.2-ml.zip 2. Add GlassFish server using the wizard; choose the directory of the unzipped 3.1.2.2 as the install dir => The wizard displays error message "Not a valid GlassFish server installation."
Weird, suddenly I can not reproduce now. Closing as invalid, I will reopen if I see this again.