I synch to two computers, mac for music and apps and pc for outlook contacts and calendar, and my horrible synch problems are completely solved by 7.7.1 -- backup now takes less than a minute on either machine, synch is back to the normal (brief) time before the 7.7 update, and my apps are no longer getting wiped from the phone when I synch to pc (I leave apps synch tab unchecked on pc and only synch apps to the mac). However, the first synch on both computers after the 7.7.1 update took at least 20 minutes. At some point I reset synch history on the pc, which may have helped, I'm not sure. I no longer get Outlook SynchClient error messages. I am really happy they fixed these problems, but I would still love to know what caused them and why they weren't found in testing.