I have the same problem, I can't download LW, it always fail mounting after few minuts, the dowload is not even finish - only about 1MB loaded-, I suppose that's the reason ! I try the download on iMac 10.3.9 with Safari 1.3.1 and Opera 8.5 with Firewall actived and not actived, I try also the download on iBook 10.3.2 with Safari 1.1.1: same !
I already submit this trouble here few month ago but never get any answer !