When I first join the server, i'll get to the point of selecting a class, sometimes a little further sometimes not even that far, then ill get the nice little message of "connection problems" for a minute or so then ill either get disconnected or ill disconnect manually. I then wait until the server times me out and kicks my id off then I can rejoin and play with no problems at all (apart from being a bullet magnet and firing plastacine bullets

also i've only encountered it on dod, when i played tfc or cs i didnt have this (fingers crossed it doesnt start happening now)
I have absolutly nothing running that isnt needed, even kill some services before loading dod (nothing critical, just development/testing stuff) so i highly doubt its something like that
i've got ample specs for it so im confident its not lack of resources
and its only started doing it in the last couple of weeks and nothing on my computer has been changed
i dont think its my net connection cos MSP hasnt said he has the same problems
and yes it happens whether or not he is playing when i load the game