I have Zimbra 8.0.3 (30 mailboxes, CentOS 6.4 - 18 GB RAM 2xXenon 2.4 8 Core) and ZeXtras Suite 1.8.7 and I noticed a common reset synchronization status on account.
I have entries in the sync.log
2013-06-12 13:34:05,319 WARN  [aaa.bbb@xxx.yy 98E81D00B67B4E14AF226F2F413965E4] [tid=5368;] sync - Sync[465]: Resetting sync states:  D: d9227f01c2d34ca3a8249f14e8c177cf/5/47/16546 S: d9227f01c2d34ca3a8249f14e8c177cf/5/47/16541
This is large account about 25GB.
I noticed it two, three times a day. This is a big problem because the synchronization takes a long time and is cumbersome.
Does anyone have a similar problem ?