Well I got another "SYNC Timing Synchronization failure - Loss of Sync" on Sep 20 2012 15:40:09.
It now shows 0 dBmV(was 2to4dbmv before) even after rebooting, anyone ever seen this? I've read that they could have turned off the measurement of the downstream signal level.
EDIT 9-22: seems to be all modems in my city, not just mine, hmmm it looks like my signal really is 0 now, interesting, but it did move up to 1dBmV.