Leopard 22:26 on Sunday
A few unexpected quirks like no destination disk appearing in the installer and a few expected ones, such as Spotlight indexing (mdworker process) stalling. I haven’t really yet found anything special in the new features, anything that would make me feel really productive (or justify the upgrade price). Quicklook might prove to be that feature when I get in the habit of using it. RSS feeds in Mail are nice. For people who lose files and do not do backups, Time Machine alone is that feature.
But most importantly, it seems to work. If you’re a Mac geek, get it.