On Windows platform the JavaFX Toolkit loads msvcr100.dll. If, however, that file is already loaded in another classloader, it will fail with a warning message of the form:

Error: failed to msvcr100.dll java.lang.UnsatisfiedLinkError: Native Library C:\Program Files\Oracle\JavaFX Runtime 2.0\bin\msvcr100.dll already loaded in another classloader

See RT-16582 for one example of this.

There is a "TODO" comment in the code recommending that this warning be guarded with an "if (verbose)" test. I propose to do just that and only print the warning if javafx.verbose is set to true.