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See the original issue https://bugzilla.redhat.com/show_bug.cgi?id=464820 The non-free EULA must be removed from the startup process of the NetBeans installed on Fedora.
Fixed since the release 6, i.e. netbeans-6.1-6.fc10.noarch.rpm See https://bugzilla.redhat.com/show_bug.cgi?id=464820