[semerda]

Are you on a mac? I have the same issue :( and only run Dropbox when I'm not engaged with my computer to let it do its thing.

Saying that, as a paying customer, I still love Dropbox since it's sync quality & ease is outstanding. I'm also a fan of their Datastore API.

[microtonal]

I am on a Mac and don't have that problem. Did you try to trace the Dropbox process to see if anything weird is happening?