I just upgraded to CS4 DW from DW2004 (ok, ok).
Previously if I made a change on a page and put it on the server it only took a couple seconds. Now it seems like the process goes through everything it can before it merely uploads the new change. First it says it can't find synchronization which is cool so I allowed it to replace everything.
But it still take 30-60 seconds per change.
I looked through the board here and the prefs and I can't find any solution.