when launching standalone fx app, in some cases, it doesn't search classes in classpath which is passed in command line

Steps to reproduce:
1) Download jar files into a dir http://jfx.sfbay.sun.com/hudson/job/presidio-deploy-scrum/label=windows-i586-14/lastSuccessfulBuild/artifact/artifacts/deployed/SignedApp/fish_signed.jar and http://jfx.sfbay.sun.com/hudson/job/presidio-deploy-scrum/label=windows-i586-14/lastSuccessfulBuild/artifact/artifacts/deployed/SignedApp/preloaders.jar
2) Launch the app by: java -cp $JAVAFX_HOME/lib/jfxrt.jar;fish_signed.jar;preloaders.jar -Djavafx.preloader.class=preloaders.LoginPreloader -jar fish_signed.jar
If following exception is thrown, bug is reproduced.
ClassNotFoundException preloaders.LoginPreloader