I have no problems syncing contacts and calendar through www.neuvasync.com which offers a free service to sync up with google - I only got m.google.com to sync a handful of times before I got errors! Never had a problem with neuvasync though, works perfectly!

Another option for syncing (its free but not open) is the microsoft synctool which is very simple to use and does a pretty good job. Once you configure the folders you want to sync and the sync technique it does exactly what it is supposed to do!