Mac Leopard calendar sync issues

According to the Spanning Sync blog, Apple's Leopard update to Mac OS X last year introduced some calendar sync bugs. An OS X update (10.5.2) last week fixed some of these bugs but introduced others "which affect not only Spanning Sync but also applications like Plaxo, Entourage, BusySync, and .Mac itself." Apple's working on fixes. Meanwhile, Mac folks should continue to sync carefully.