I don’t know about your timing issue, as we work in 29.97
But I’ve been Dropbox certified using Compressor 3. We waited until we installed our studio upgrades before buying Episode or MC Coder. I’ve had DG telestream spots back to us to assure us that they look fine visually (as we had problems with Fast Channel’s ftp site in the past & interlacing issues).
Compressor 3 does work though.