Bad class file error when using Scala 2.8.0-rc1 in Javafx 1.2

Question

When trying to import scala.Option in a javafx script, I get the following javafxc error:

bad class file: scala/Option$$anonfun$orNull$1.class(scala:Option$$anonfun$orNull$1.class)
undeclared type variable: A1
Please remove or make sure it appears in the correct subdirectory of the classpath.
import scala.Option;
             ^

I am using Scala 2.8.0-RC1, Javafxc 1.2.3_b36, JVM 1.6.0_18-b07, OS Ubuntu 9.10. The same code was working in Scala 2.7.7 .

Later edit: The same error is reported in case I import scala.immutable.Seq/List/Traversable/Iterable . I have tried the imports in a default Netbeans 6.8 JavaFX project which has in the classpath only scala-library.jar.