i've had no problems capturing DV with my panasonic DV103.
using a sony TRV22 causes the whole O/S (W2K) to crash within
60 secs resulting in an automatic reboot (even though auto reboot is NOT
selected in the control panel).
if i play a panasonic tape thru the sony, capturing is fine. a sony
recorded tape thru the panasonic also crashes the system.

i use video studio v7 and scenalyzer to capture. capturing behavior
is identical in both applications.