currently online jars have no MANIFEST.MF so that the JarClassloader fail to read it.

What is the expected output? What do you see instead? please provide an META-INF/MANIFEST.MF in downloadable jar-files

What version of the product are you using? On what operating system?

Please provide any additional information below.

The native package installer of JavaFX 2.x crashes when trying to bundle the provided binary JAR file due to the missing MANIFEST.MF file. That makes it currently impossible to create a build/deployment chain (e.g. using Ant/Ivy or Maven) without some further workarounds.