Using Zimbra Desktop 7.2.1.

I'm getting many sync errors, perhaps during application of filtering rules, for sub folders. All folders were created on remote host via remote host's webmail (Horde). I originally had the same problem with folders created directly in Zimbra Desktop (which I then deleted, and let them be created via sync with the remote host IMAP server.) Seemingly there is an error renaming the folder from caps INBOX.* to Inbox.*

Here is the a sample error message:

Product name: Zimbra Desktop
Product version: 7.2.1
Build ID: 11637
Release type: GA
OS Platform: Windows 7 x86 6.1
Time of event: 2012-11-26 05:41:19
Error type: RENAME failed: RENAME failed: Invalid argument
Item ID: 7091
Error summary: Synchronization of folder '/Inbox/Newsletters-CIO' disabled due to error: Unable to rename remote folder to Inbox.Newsletters-CIO

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Affected data - PLEASE REMOVE ANY SENSITIVE INFORMATION (size=70):
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Failed request: C04 RENAME INBOX.Newsletters-CIO Inbox.Newsletters-CIO

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Failure details - PLEASE REMOVE ANY SENSITIVE INFORMATION
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com.zimbra.cs.mailclient.CommandFailedException: RENAME failed: RENAME failed: Invalid argument
at com.zimbra.cs.mailclient.imap.ImapRequest.failed(I mapRequest.java:210)
at com.zimbra.cs.mailclient.imap.ImapRequest.failed(I mapRequest.java:206)
at com.zimbra.cs.mailclient.imap.ImapRequest.checkSta tus(ImapRequest.java:126)
at com.zimbra.cs.mailclient.imap.ImapRequest.sendChec kStatus(ImapRequest.java:112)
at com.zimbra.cs.mailclient.imap.ImapConnection.renam e(ImapConnection.java:218)
at com.zimbra.cs.datasource.imap.RemoteFolder.renameT o(RemoteFolder.java:72)
at com.zimbra.cs.datasource.imap.ImapFolderSync.renam eFolder(ImapFolderSync.java:512)
at com.zimbra.cs.datasource.imap.ImapFolderSync.check TrackedFolder(ImapFolderSync.java:488)
at com.zimbra.cs.datasource.imap.ImapFolderSync.syncF older(ImapFolderSync.java:125)
at com.zimbra.cs.datasource.imap.ImapSync.syncRemoteF olders(ImapSync.java:265)
at com.zimbra.cs.datasource.imap.ImapSync.syncFolders (ImapSync.java:232)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:164)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:136)
at com.zimbra.cs.offline.OfflineImport.importData(Off lineImport.java:100)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:317)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:277)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncAllLoc alDataSources(DataSourceMailbox.java:439)
at com.zimbra.cs.mailbox.DataSourceMailbox.sync(DataS ourceMailbox.java:478)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncOnTime r(DataSourceMailbox.java:406)
at com.zimbra.cs.mailbox.SyncMailbox$1.run(SyncMailbo x.java:279)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)

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