Short desc:
  preconditions: x32 bit JRE on x64 bit linux ( tested on Ubuntu 10.04 x64 ), cache is cleared
  test: run jnlp application that requests shortcut to be created on desktop

  result:
     - x64 bit native lib load error
      ( actually it might be considered as expected as x64bit Linux misses x32 libs
        that are used by java/javaws ):

    (<unknown>:26140): libgnomevfs-WARNING **: Cannot load module `/usr/lib/gnome-vfs-2.0/modules/libfile.so' (/usr/lib/gnome-vfs-2.0/modules/libfile.so: wrong ELF class: ELFCLASS64)

    - much more negative effect: jnlp application fails to load/execute, it just hangs
      ( sometimes with "downloading app" window, sometimes with "patching app window )

 All works ok with x64 but java.

 And even more:
      - try to run an application that requests shortcut with x64 javaws - it works OK
      - then try to run the same app with x32 bit javaws:
           "Cannot load module ...wrong ELF class: ELFCLASS64" message still appears,
           but application runs correctly.
       Looks like cache created by x64 javaws helps to avoid hangs in this case.
See details/test links in "Comments" section.