The short answer is they don’t work together, I thought they would, but 2.2.3 is now a 10.6 only update.
The longer answer… In the back-and-forth process of getting TaskPaper approved by the Mac App Store, we had to swap out the query parser for search. Probably due to developer stupidity (me) I just couldn’t get the antler generated parser lib signed correctly in the app store version. So instead I switched 2.2.3 to use same parser as the iOS version (written in objective-c which I can understand), which seemed to keep TaskPaper from being rejected time and time again during the MAS review process.
But turns out that the query parser is using some NSPredicate strings that don’t parse correctly on 10.5 and thus all the crashing. Grrg, big headache. The joke, is this update is very small functionality wise… just lots of quick hacking trying to get it built for the app store. I think going forward I’m just going to make this a 10.6 release and drop support for 10.5. If you still have 10.5 please just use TaskPaper 2.2.2.
TaskPaper for Mac and iOS hasn’t had many updates for the past year. The iOS version is soon getting a big update that will add Dropbox sync support. But I don’t see any changes coming for the Mac version in the mid term. I am working (with help even) on a big rewrite update, but as the TextMate guy will tell you, those tend to take a long time.