reckon you may need to get a more recent svn. I'm not on Leopard myself yet but know there has been discussion over on the firefly forum. Suggest you search/post over there as well.
You can pick up a nightly here:
either 1586 or 1696 are your choices. see if that works.
G5, OS X 10.5.8, 3 x M1000, iTunes 10.4, slimserver 6.2.1/alienbbc (now redundant), firefly svn 1586, uNSLUng 6.8