So far it SEEMS to be working, but I don't know if i trust it.
I encountered a few minor snags when installing, but I got it working by just following the prompts in terminal then following the prompts when I first opened it.
But in the process I searched for advice on the minor snags, and I found a few things which said that dropbox needs GNOME desktop (when Kubuntu has KDE) or Dropbox needs nautilus which Kubuntu is not safely compatible with.
So far the only issue I can SEE is that the icon in the taskbar is just a cloud rather than the usual distinctive box... but that's not actually a problem. Can I trust it for stability?
It launches dropbox on startup even though I told it not to, but that's not a total deal breaker... but it is kinda a bad sign.