Comment 11 for bug 485004

Sorry I can't contribute much to the troubleshooting here, but I can confirm that Ubuntu One is painfully slow, especially compared to Dropbox. I found that to be a barrier to use. One thing to keep in mind while investigating this is Dropbox's "LAN sync" functionality. That might be partially responsible for the faster transfer speeds reported with Dropbox, although it seems to me that Ubuntu One is far slower on remote transfers as well.