Blocks....
SnowLeopard introduced a new feature called Blocks. I know, I am lagging behind a bit, but my users still run 10.4 (some, few only), and mainly 10.5. So I had no real need to learn all the new stuff the first day I had a SL version running. Now I am playing around with all that. While I see its power in general, I see also many scenarios in modern apps that will make life hard when using blocks - or at least larger blocks. For example bcAdmin 2 uses CoreData quite a lot in the background. Many tasks that are computation intensive (finding bat calls) will regularly access a ManagedObjectContext. Haven't played around with it, but knowing of how fragile that gets when using threads manually, I fear some of my ideas will just not work out as I expect leaving my CD stack/context in a mess. :-(