Network Bug Question...

In Vista RC1 5728 and RC2 5744, I have had network problems where if I
copy a music or picture file onto another computer's network folder from
my computer with Vista, it shows 'calculating time remaining' and
freezes up every time. I end up having to reset my computer to clear it
up. It seems to copy word documents onto other computers' network
folders just fine. My computer with Vista also loses its Internet
connection sometimes when I try to access my computer's network folder
from another computer. The only way to fix that is to restart the
computer. The network is all wired, not wireless and there are three
computers on the network through a 4-port Linksys router. My computer
has both XP and Vista, while the other two computers have XP only. I do
not experience networking issues on my computer when I'm on XP. My
question here is has anybody else experienced a similar networking
problem and the biggest question is, has this been fixed in the RTM
version of Vista? My networking adapter is an onboard NVIDIA nForce
Networking Controller on an Asus K8N motherboard. Besides this bug and
the mfpmp in WMP11, I'm starting to like Vista as it loads applications
a lot faster and is generally more responsive than XP on the same
computer. (I was previously pretty skeptical about it.) I did not
experience this networking issue in Beta 2 (5384), Pre-RC1 (5536), or
RC1 (5600). I had other networking problems in Beta 2, but they were
resolved in 5536. So, anybody know? Thanks.