Most applications fail to run, with this error:
/home/bothner/Java/jdk1.7.0_03/jre/bin/java: symbol lookup error: /home/bothner/JWebPane/jfx/artifacts/sdk/rt/lib/amd64/libglass.so: undefined symbol: g_thread_init
This happens at least on Kubuntu 12.4 (beta), 64-bit. (I remember a similar issue on Fedora, but I haven't confirmed it yet.)