Not sure if I have stumbled across something useful but here it is . I was looking for a PCIe firewire card for my new interface ( no , not a X-cite

http://support.microsoft.com/kb/955408
It mentions firewire speed being reduced from S400 to S100 and I thought this might be part of the reason so many people have problems with audio interfaces and the like . Please comment on your thoughts regarding this info .
Ben