jnlp files that run with SUN's javaws do fail with netx, if the jnlp file does not have a newline at the end of the file.
Error message:
netx: Invalid XML document syntax.
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java version "1.6.0_0"
OpenJDK Runtime Environment (build 1.6.0_0-b11)
OpenJDK 64-Bit Server VM (build 1.6.0_0-b11, mixed mode)
netx v0.5