This does not happen when I play by myself, but only if I am playing with friends.
The crash occurs as the smoke screen runs out, not during, or at start, always as it runs out.
I've been keeping track of it all day and already d/c'ed dozens of times, and every single one was as I mentioned while smoke screen runs out.
It's not a problem with my internet connection, everything else I am running ventrilo, web, etc. stay connected, only d/c from the game.
Now I do not get d/c'ed every single time I use smoke screen, only occasionally, always the same way though. Please look into it and see if it is a bug or not, thank you.