Dropbox 1.6.6 stable build has been released for Windows, Mac and Linux and available for download from Dropbox homepage. This version has fixed excessive logging issue. Here it needs to be remembered that Dropbox 1.6.5 version has been released recently, better you need to download and install latest version manually as automatic update push to Dropbox client could take days or more than week to upgrade client program installed on your Computer to the new version.
Download Dropbox version 1.6.6
Previous build stopped Growl from showing notifications on Snow Leopard, that issue not yet resolved, Dropbox still trying to bring Growl in place of their notification system for Mac OS X 10.6 users.