I doubt it, but as has been pointed out in this
thread there is some ambiguity about the need for the arch attribute. I can see that for linux it is needed as sparc and ppc client might not work with i386 binaries, but I've had no reports of anyone even trying. For now I *might* update my webstart to check for i386 under linux, but with no builds and no volunteers with the hardware to build and test, we can't do the builds anyway. If you have ia64 or x86_64 access you could try the i386 binaries and/or compile from source and upload the binary somewhere.
I have no idea what will happen under windows, it may be that ia64 and x86_64 will run the x86 lib quite happily, in which case it probably doesn't need the arch flag at all.
I have no clue how OSX handles this or even if there are different options on the mac for arch type.
I *believe* that you can do something like
<resources os="Linux" arch="i386" arch="ia64" arch="x84_64">
to load the same archive for any arch that matches. I've not got time or the hardware to test that right now though.
Kev posted whilst I was so I didn't see his post, but that would work too.