I am using multiple clients windows, mac, web and android.
As of today, versions are 10.8.5, 10.8.4 (to the best of my memory as i don't have my mac with me right now), 10.8.4 and 10.5 respective fro Win, Mac Web and Android.
I am so happy with win store version 10.8.5, it's fast, no obvious bugs, reminder system back in place. Please bring every other platform up to date please !!