JavaFx is being built universal (32 and 64-bit) on Mac OS X. However, for bundling purposes with 7u4 and later we only need to include the 64-bit slice of the libraries since we are only shipping a 64-bit JDK. libWebPaneJava.dylib is 45MB alone -- removing the i386 part should save close to half that.

We may be building universal to support Java 6, but for the co-bundle phase we could use lipo to remove the unwanted parts.