I have had that problem off and on only when running other programs mostly while viewing networked drives or burning dvd's.

However, my main concern is that ALL of my dcc sends and recieves have lost about 30% of their speed after upgrading to Vista from XP Pro. Anyone have any tips. I used dslreports.com's tweak tester and all it turned up was to make the RWIN a little bigger which did not help.