Another report. Note that I've replaced my real email address with "myemail@mail.box" to try to reduce my spam load :

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Product name: Zimbra Desktop
Product version: 0.84
Build ID: 1119
Release type: BETA
OS Platform: Windows XP x86 5.1
Time of event: 2008-05-22 17:25:42
Issue summary: push item failed

Failure details:
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com.zimbra.cs.mailbox.MailServiceException$NoSuchI temException: no such message: 60942
ExceptionId:sync-timer-myemail@mail.box:1211455542406:6bedbe8850b94064
Code:mail.NO_SUCH_MSG ArgitemId, IID, "60942")
at com.zimbra.cs.mailbox.MailServiceException.NO_SUCH _MSG(MailServiceException.java:168)
at com.zimbra.cs.mailbox.MailItem.noSuchItem(MailItem .java:1161)
at com.zimbra.cs.db.DbMailItem.getById(DbMailItem.jav a:1728)
at com.zimbra.cs.mailbox.MailItem.getById(MailItem.ja va:1101)
at com.zimbra.cs.mailbox.Mailbox.getItemById(Mailbox. java:1958)
at com.zimbra.cs.mailbox.OfflineMailbox.getItemById(O fflineMailbox.java:175)
at com.zimbra.cs.mailbox.Mailbox.getItemById(Mailbox. java:1927)
at com.zimbra.cs.mailbox.Mailbox.getMessageById(Mailb ox.java:2879)
at com.zimbra.cs.mailbox.PushChanges.syncMessage(Push Changes.java:868)
at com.zimbra.cs.mailbox.PushChanges.sync(PushChanges .java:246)
at com.zimbra.cs.mailbox.PushChanges.sync(PushChanges .java:144)
at com.zimbra.cs.mailbox.MailboxSync.sync(MailboxSync .java:130)
at com.zimbra.cs.mailbox.OfflineMailbox.sync(OfflineM ailbox.java:103)
at com.zimbra.cs.mailbox.OfflineMailbox.syncOnTimer(O fflineMailbox.java:89)
at com.zimbra.cs.mailbox.DesktopMailbox$1.run(Desktop Mailbox.java:113)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)

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Here is the log file around the relevant period:

2008-05-22 17:20:07,281 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting change push
2008-05-22 17:20:09,328 INFO [sync-timer-myemail@mail.box] [mid=3;] offline - push: batch updated 60947
2008-05-22 17:20:09,328 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending change push
2008-05-22 17:20:12,125 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127772]
2008-05-22 17:20:12,125 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - delta: updated message (60947): Re: talking tonight
2008-05-22 17:20:12,218 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127773]
2008-05-22 17:21:15,218 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127773]
2008-05-22 17:21:15,218 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127773]
2008-05-22 17:22:23,031 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127773]
2008-05-22 17:22:23,031 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127773]
2008-05-22 17:23:25,312 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127773]
2008-05-22 17:23:25,312 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127773]
2008-05-22 17:24:29,859 WARN [btpool0-449] [name=myemail@mail.box;mid=3;ip=127.0.0.1;ua=Zimbra WebClient - [unknown] (Win)/dev build;] mailbox - could not delete blob C:\zimbra\zdesktop\store\0\3\msg\14\60942-128589.msg during commit
2008-05-22 17:24:30,109 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127773]
2008-05-22 17:24:30,109 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127773]
2008-05-22 17:24:30,187 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting change push
2008-05-22 17:25:15,203 WARN [btpool0-450] [name=myemail@mail.box;mid=3;ip=127.0.0.1;ua=Zimbra WebClient - [unknown] (Win)/dev build;] mailbox - could not delete blob C:\zimbra\zdesktop\store\0\3\msg\14\60942-128624.msg during commit
2008-05-22 17:25:42,406 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - push: updated message (60942)
2008-05-22 17:25:42,531 WARN [sync-timer-myemail@mail.box] [mid=3;] offline - sync failure for id=60942; generating failure report
com.zimbra.cs.mailbox.MailServiceException$NoSuchI temException: no such message: 60942
ExceptionId:sync-timer-myemail@mail.box:1211455542406:6bedbe8850b94064
Code:mail.NO_SUCH_MSG ArgitemId, IID, "60942")
at com.zimbra.cs.mailbox.MailServiceException.NO_SUCH _MSG(MailServiceException.java:168)
at com.zimbra.cs.mailbox.MailItem.noSuchItem(MailItem .java:1161)
at com.zimbra.cs.db.DbMailItem.getById(DbMailItem.jav a:1728)
at com.zimbra.cs.mailbox.MailItem.getById(MailItem.ja va:1101)
at com.zimbra.cs.mailbox.Mailbox.getItemById(Mailbox. java:1958)
at com.zimbra.cs.mailbox.OfflineMailbox.getItemById(O fflineMailbox.java:175)
at com.zimbra.cs.mailbox.Mailbox.getItemById(Mailbox. java:1927)
at com.zimbra.cs.mailbox.Mailbox.getMessageById(Mailb ox.java:2879)
at com.zimbra.cs.mailbox.PushChanges.syncMessage(Push Changes.java:868)
at com.zimbra.cs.mailbox.PushChanges.sync(PushChanges .java:246)
at com.zimbra.cs.mailbox.PushChanges.sync(PushChanges .java:144)
at com.zimbra.cs.mailbox.MailboxSync.sync(MailboxSync .java:130)
at com.zimbra.cs.mailbox.OfflineMailbox.sync(OfflineM ailbox.java:103)
at com.zimbra.cs.mailbox.OfflineMailbox.syncOnTimer(O fflineMailbox.java:89)
at com.zimbra.cs.mailbox.DesktopMailbox$1.run(Desktop Mailbox.java:113)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
2008-05-22 17:25:42,843 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending change push
2008-05-22 17:25:44,468 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127773]
2008-05-22 17:25:46,562 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - initial: created appointment (60927): Adam Henry
2008-05-22 17:25:46,593 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127776]
2008-05-22 17:27:01,406 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - push: sent pending mail (1073744571): Appeal: ID# G024A00048 Plan# 231922A024
2008-05-22 17:27:01,468 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - push: deleted pending draft (1073744571)
2008-05-22 17:27:03,312 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127776]
2008-05-22 17:28:22,296 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - initial: created message (60954): Appeal: ID# G024A00048 Plan# 231922A024
2008-05-22 17:28:22,390 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127777]
2008-05-22 17:28:22,453 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting change push
2008-05-22 17:28:24,796 INFO [sync-timer-myemail@mail.box] [mid=3;] offline - push: batch updated 60944
2008-05-22 17:28:26,796 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - push: created contact (60955) from local (1073744572)
2008-05-22 17:28:28,593 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - push: created contact (60956) from local (1073744573)
2008-05-22 17:28:30,703 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - push: pushed deletes: [60942]
2008-05-22 17:28:30,703 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending change push
2008-05-22 17:28:32,500 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127777]
2008-05-22 17:28:32,593 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - delta: deleted leaves: [60942]
2008-05-22 17:28:32,593 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - delta: updated message (60944): talking tonight
2008-05-22 17:28:34,421 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - delta: updated contact (60955): service
2008-05-22 17:28:34,609 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - delta: updated contact (60956): Sneed, Mark
2008-05-22 17:28:34,687 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127781]
2008-05-22 17:29:38,515 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127781]
2008-05-22 17:29:38,515 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127781]
2008-05-22 17:30:41,718 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127781]
2008-05-22 17:30:41,953 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:31:46,671 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:31:46,671 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:32:51,203 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:32:51,203 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:33:57,984 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:33:57,984 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:35:02,078 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:35:02,078 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:36:10,953 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:36:10,953 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:37:13,046 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:37:13,046 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:38:18,968 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:38:18,968 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:38:24,578 INFO [sync-timer-dir] [] offline - dsync: remote server version: 5.0.5_GA_2201.RHEL4_64 20080417001606 20080417-0016 NETWORK
2008-05-22 17:38:24,578 WARN [sync-timer-dir] [] misc - checkValue: no attribute info for: zimbraAuthTokenLifetime
2008-05-22 17:38:24,578 WARN [sync-timer-dir] [] misc - checkValue: no attribute info for: zimbraAdminAuthTokenLifetime
2008-05-22 17:38:26,140 DEBUG [sync-timer-dir] [] offline - dsync: synchronized account: myemail@mail.box
2008-05-22 17:38:26,203 DEBUG [sync-timer-dir] [] offline - dsync: updated identity: myemail@mail.box/John Kate Marsden
2008-05-22 17:38:26,234 DEBUG [sync-timer-dir] [] offline - dsync: updated signature: myemail@mail.box/Personal
2008-05-22 17:38:26,234 DEBUG [sync-timer-dir] [] offline - dsync: updated signature: myemail@mail.box/John Kate Marsden
2008-05-22 17:38:26,250 DEBUG [sync-timer-dir] [] offline - dsync: updated signature: myemail@mail.box/FH Normal
2008-05-22 17:38:26,718 DEBUG [sync-timer-dir] [] offline - dsync: pulled 0 filter rules: myemail@mail.box
2008-05-22 17:39:22,625 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:39:22,625 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]
2008-05-22 17:40:28,031 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - starting delta sync [token 127783]
2008-05-22 17:40:28,031 DEBUG [sync-timer-myemail@mail.box] [mid=3;] offline - ending delta sync [token 127783]