Vista - RC1 Network Adapter Buffers Out of Range Error

Reviewing the system event log shows two errors reported for my Marvell
Yukon ethernet controller at startup. "Receive buffers out of range."
and "Transmit buffers out of range."

My motherboard has two Marvell Yukon gigabit controllers. What I don't
know is which adapter the error messages refer to and what the
appropriate range should be. One adapter is a PCI and the other PCI-E.
For the PCI controller both driver buffers' defaults are set at 256. For
the PCI-E they are both set at 50. The PCI adapter driver only allows
setting between 256 and 512 in increments of 128. The PCI-E adapter
driver does not have this restriction.

Can anyone offer any insight as to which adapter's buffers are "out of
range" and what the appropriate setting would be for a 100Mbps home LAN
connected to a cable modem with 6Mbps downstream and 600Kbps upstream
capacity? How should they change if I upgrade to a gigabit LAN?