RouteConverter and Mac OS X

[hvdwolf]

And as a side note: the prereleases have a Java version check for a version greater than 1.6.0_13 since there is a bug inside the XML parser in previous versions. But that code is compiled against Java 6...

I did not read this careful enough. Does that mean the prerelease gives an error message when the java version is too low? <1.6 ?
Or does it give an error/warning message on java versions between 1.6.0 and 1.6.0_13?

Also: Is it then necessary to use the Java6Check.jar?