There’s a new beta version of Stacks. And this time we’ve specifically fixed a bunch of OS X 10.9 crashes, bugs, and missing features. If you’re one of the few still using that OS version I’d be very happy to hear of feedback about this latest build.
You can grab the download links, report bugs, ask for features over on our Slack channel. It’s open to anyone and totally free, please come have a look: http://slack.yourhead.com