One thing I found irritating about the default config was that it didn't replicate the appearance settings that the user has set up already in Windows.
I think I'll reinstall but with the minimal version, as I have no need for the image/audio preview stuff really.
Explorer memory usage is 2MB lower than usual, which is nice. However Dopus uses ~12MB :-)
Slightly irritating, the draconian contact scheme on their website, so I can't contact them suggesting that they should include simultaneous FTP transfers...