One my main computer (not the Tormach) I just recently noticed that the dropbox application has past chrome for top memory usage (273 Megs) Even though I haven't moved anything through it in a few weeks
From their website
What factors cause high memory (RAM) usage?
There are several factors that can cause higher than expected memory (RAM) usage, including the number of files stored in your Dropbox folder. The more files you have in your Dropbox folder, the more memory Dropbox will need to keep track of them.
I've got 247 actual files, about 31 megs total in the dropbox and it's using over a 1/4 Gig of ram to look after it.....
M