oh and u can find problems with the prolific pl-3507 chipset anywhere ... just google it and u'll see ...
here's a few links to get u started:
http://forums.storagereview.net/inde...howtopic=15437 http://forum.rpc1.org/viewtopic.php?...highlight=3507
here's an excerpt:
"I was having problems writing data to a drive (HDD and DVD-/+RW) in a enclosure with the Prolific PL-3507 Chipset... but only when I used the Firewire, had no problem with the USB2."