There are some tags in fx:deploy Ant task that have no effect on the generated output html and jnlp file:
* fx:preferences install=true, menu=true, shortcut=true: Does not add Add/Remove Programs entry nor Start menu icon nor desktop icon, does not affect the generated JNLP file
* fx:deploy embedjnlp attribute: App always embedded in HTML even if I set this to 'false'
* fx:deploy offlineallowed attribute: Offline app is not accessible (see the first point)
* fx:splash inside fx:info: Does not affect anything
* fx:icon kind=splash: Does not show the specified image during downloading

I'v attached the Ant build file.