Steps: 1. I installed fedora16 and with firefox13 in it. 2. I installed jdk1.7.0_05, and do right link to firefox plugin path. (can verify it success through "about:plugins" and "add on menu -> plugins" and "www.java.com jre verify") 3. When I runing java applet with default config, it can work well. 4. But if I config that "jre/bin/ControlPane -> Advanced -> Java console -> Show console". Expect: Applet can run, and auto show java console. Actually: The applet cant run anymore. Java console cant show. If I change the option to "Hide console" like before, it can run well. Others: 1. I use another fedora16 live cd version, and it takes firefox7, I installed jdk1.7.0_05, no any issue. If I update firefox to 13v, this issue happens. 2. I use fedora16, with firefox13, and I installed jdk1.6, no this issue. 3. I use fedora17 with firefox12, installed jdk1.7, still have this issue. So I guess if jdk1.7 enable the show console option + firefox13(or 12), always can't start applet.
WFM on Ubuntu. Unfortunately, I don't have access to Fedora 16. Can you still reproduce this issue with current Firefox and java builds?