If you’re a Dropbox user running Mac OS X 10.6 Snow Leopard or earlier, you might have noticed that notifications have been missing. Happily, Dropbox 1.6.5 fixes that problem, and it ensures that Dropbox autostarts after updating and fixes an issue with icon overlays in the Dropbox folder. If you aren’t sure which iteration of Dropbox you’re running, hover over the Dropbox icon in the menu to see the version in a tooltip, and if the main Dropbox download link gives you an older version, check the Dropbox forums. (Free, 23.1 MB, release notes)
View Full Threads in Apple Mail
Many users are aware of Apple Mail's message threading feature, which highlights related email messages within the Inbox. However, many people don't know how to view both sent and received messages within a thread at once. To do so, first enable Message Threading under Mail's Viewing Preferences. Then, Command-click both the mailbox containing your threaded messages, and your Sent box. Now you can view both sent and received messages within the thread simultaneously.
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There seem to be two solutions. First, if you go to the Dropbox Forums, there's always a thread about the latest stable release that links to a direct download. In this case, it's:
Second, in your Dropbox account settings on the Web, there's an option labeled "Include me on early releases." It seems that if you select that, you'll get auto-updates. It's entirely unclear why Dropbox would push a stable update to the main download page without auto-updating existing customers.