Version 4.4.10 of Default Folder X is now up on the site, sporting compatibility with the latest developer release of Mac OS 10.8 (Mountain Lion). This includes being properly code signed so Mountain Lion’s new “Gatekeeper” will allow you to install it when you have the default setting of “Mac App Store and identified developers” turned on.
Other improvements include an increase in performance – two bottlenecks that were causing long pauses when refreshing file dialogs have been eliminated – and corrections for compatibility with Firefox 11 and Mathematica. Default Folder X’s OpenMeta support has also gotten some love, bringing back autocompletion of tags that you’ve entered using Leap and Yep (this was lost when Ironic Software modified them to meet Mac App Store requirements), and addressing a problem when tagging files inside of Adobe InDesign.
Round that out with some additional bug fixes and performance tweaks and you’ve got a worthwhile (and free) update. Enjoy!