Hey folks... this one's got me stumped. I'm prototyping a Zimbra Network Edition install on a 30 day trial of RHEL 4 and CentOS 4.4, both under VMware. Each installation is completely independent - just multiple installs to feel out the differences. I've done a minimal install, installed compat-libstdc++-33 and compat-libstdc++-296, as well as libidn, curl, and fetchmail (as required by the Zimbra install. I've also cranked up maximum attachment size in the MTA tab of the Global Settings window to 100000k. Nothing else funny.

While attempting to import an account using imapsync, I get interesting errors (in /opt/zimbra/log/zimbra.log) on quite a few messages (as far as I can tell, only ones with attachments) and imapsync says something like:

Couldn't append msg #23 (Subject:[Fw: 11076 die set]) to folder Gill T&-D: Error trying to append: 859 NO APPEND failed
Here's a zimbra.log section:
Code:
2006-12-28 10:39:57,772 WARN  [ImapSSLServer-1] [ip=192.168.1.3;name=stevev@mail2.mtd-inc.com;] TransformationClient - Error sending document; tell convertd never mind
java.net.SocketException: Connection reset
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
        at java.io.DataOutputStream.write(DataOutputStream.java:90)
        at com.zimbra.cs.convert.TransformationClient.copyChunks(TransformationClient.java:122)
        at com.zimbra.cs.convert.TransformationClient.extract(TransformationClient.java:156)
        at com.zimbra.cs.convert.SocketTransformationStub.doExtract(SocketTransformationStub.java:68)
        at com.zimbra.cs.convert.SocketTransformationStub.extract(SocketTransformationStub.java:106)
        at com.zimbra.cs.mime.handler.DefaultHandler.getContentImpl(DefaultHandler.java:85)
        at com.zimbra.cs.mime.MimeHandler.getContent(MimeHandler.java:257)
        at com.zimbra.cs.mime.ParsedMessage.analyzePart(ParsedMessage.java:589)
        at com.zimbra.cs.mime.ParsedMessage.analyzeMessage(ParsedMessage.java:508)
        at com.zimbra.cs.mime.ParsedMessage.analyze(ParsedMessage.java:252)
        at com.zimbra.cs.mailbox.Mailbox.addMessage(Mailbox.java:3054)
        at com.zimbra.cs.mailbox.Mailbox.addMessage(Mailbox.java:3040)
        at com.zimbra.cs.imap.ImapAppendOperation.callback(ImapAppendOperation.java:126)
        at com.zimbra.cs.operation.Operation.schedule(Operation.java:190)
        at com.zimbra.cs.imap.ImapHandler.doAPPEND(ImapHandler.java:1163)
        at com.zimbra.cs.imap.ImapHandler.executeRequest(ImapHandler.java:342)
        at com.zimbra.cs.imap.ImapHandler.processCommand(ImapHandler.java:227)
        at com.zimbra.cs.tcpserver.ProtocolHandler.processConnection(ProtocolHandler.java:231)
        at com.zimbra.cs.tcpserver.ProtocolHandler.run(ProtocolHandler.java:198)
        at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:595)
2006-12-28 10:39:57,799 WARN  [ImapSSLServer-1] [ip=192.168.1.3;name=stevev@mail2.mtd-inc.com;] TransformationClient - Socket error for client at port 47350: java.net.SocketException: Broken pipe
2006-12-28 10:39:58,826 WARN  [ImapSSLServer-1] [ip=192.168.1.3;name=stevev@mail2.mtd-inc.com;] ParsedMessage - Parse error on MIME part 3 (image/jpeg, Message-ID: <000901c62284$593aa1c0$f101a8c0@mtd2ub5020gwg>)
com.zimbra.cs.mime.MimeHandlerException: cannot extract text
        at com.zimbra.cs.mime.handler.DefaultHandler.getContentImpl(DefaultHandler.java:92)
        at com.zimbra.cs.mime.MimeHandler.getContent(MimeHandler.java:257)
        at com.zimbra.cs.mime.ParsedMessage.analyzePart(ParsedMessage.java:589)
        at com.zimbra.cs.mime.ParsedMessage.analyzeMessage(ParsedMessage.java:508)
        at com.zimbra.cs.mime.ParsedMessage.analyze(ParsedMessage.java:252)
        at com.zimbra.cs.mailbox.Mailbox.addMessage(Mailbox.java:3054)
        at com.zimbra.cs.mailbox.Mailbox.addMessage(Mailbox.java:3040)
        at com.zimbra.cs.imap.ImapAppendOperation.callback(ImapAppendOperation.java:126)
        at com.zimbra.cs.operation.Operation.schedule(Operation.java:190)
        at com.zimbra.cs.imap.ImapHandler.doAPPEND(ImapHandler.java:1163)
        at com.zimbra.cs.imap.ImapHandler.executeRequest(ImapHandler.java:342)
        at com.zimbra.cs.imap.ImapHandler.processCommand(ImapHandler.java:227)
        at com.zimbra.cs.tcpserver.ProtocolHandler.processConnection(ProtocolHandler.java:231)
        at com.zimbra.cs.tcpserver.ProtocolHandler.run(ProtocolHandler.java:198)
        at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:595)
Caused by: com.zimbra.cs.convert.ConversionException: Cannot connect to convertd
        at com.zimbra.cs.convert.SocketTransformationStub.doExtract(SocketTransformationStub.java:71)
        at com.zimbra.cs.convert.SocketTransformationStub.extract(SocketTransformationStub.java:106)
        at com.zimbra.cs.mime.handler.DefaultHandler.getContentImpl(DefaultHandler.java:85)
        ... 15 more
Caused by: java.net.SocketException: Broken pipe
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:115)
        at java.io.DataOutputStream.writeInt(DataOutputStream.java:180)
        at com.zimbra.cs.convert.TransformationClient.copyChunks(TransformationClient.java:127)
        at com.zimbra.cs.convert.TransformationClient.extract(TransformationClient.java:156)
        at com.zimbra.cs.convert.SocketTransformationStub.doExtract(SocketTransformationStub.java:68)
        ... 17 more
2006-12-28 10:39:58,854 WARN  [ImapSSLServer-1] [ip=192.168.1.3;name=stevev@mail2.mtd-inc.com;] ParsedMessage - Message had parse errors in 1 parts (Message-Id: <000901c62284$593aa1c0$f101a8c0@mtd2ub5020gwg>, Subject: 540BWC2.jpg;540BWC1.jpg)
2006-12-28 10:39:58,855 WARN  [ImapSSLServer-1] [ip=192.168.1.3;name=stevev@mail2.mtd-inc.com;] imap - APPEND failed
com.zimbra.cs.service.ServiceException: system failure: failed to analyze part
        at com.zimbra.cs.service.ServiceException.FAILURE(ServiceException.java:174)
        at com.zimbra.cs.mime.ParsedMessage.analyzeMessage(ParsedMessage.java:517)
        at com.zimbra.cs.mime.ParsedMessage.analyze(ParsedMessage.java:252)
        at com.zimbra.cs.mailbox.Mailbox.addMessage(Mailbox.java:3054)
        at com.zimbra.cs.mailbox.Mailbox.addMessage(Mailbox.java:3040)
        at com.zimbra.cs.imap.ImapAppendOperation.callback(ImapAppendOperation.java:126)
        at com.zimbra.cs.operation.Operation.schedule(Operation.java:190)
        at com.zimbra.cs.imap.ImapHandler.doAPPEND(ImapHandler.java:1163)
        at com.zimbra.cs.imap.ImapHandler.executeRequest(ImapHandler.java:342)
        at com.zimbra.cs.imap.ImapHandler.processCommand(ImapHandler.java:227)
        at com.zimbra.cs.tcpserver.ProtocolHandler.processConnection(ProtocolHandler.java:231)
        at com.zimbra.cs.tcpserver.ProtocolHandler.run(ProtocolHandler.java:198)
        at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:595)
Caused by: com.zimbra.cs.convert.ConversionException: Cannot connect to convertd
        at com.zimbra.cs.convert.SocketTransformationStub.doExtract(SocketTransformationStub.java:71)
        at com.zimbra.cs.convert.SocketTransformationStub.extract(SocketTransformationStub.java:106)
        at com.zimbra.cs.mime.handler.DefaultHandler.getContentImpl(DefaultHandler.java:85)
        at com.zimbra.cs.mime.MimeHandler.getContent(MimeHandler.java:257)
        at com.zimbra.cs.mime.ParsedMessage.analyzePart(ParsedMessage.java:589)
        at com.zimbra.cs.mime.ParsedMessage.analyzeMessage(ParsedMessage.java:508)
        ... 12 more
Caused by: java.net.SocketException: Broken pipe
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:115)
        at java.io.DataOutputStream.writeInt(DataOutputStream.java:180)
        at com.zimbra.cs.convert.TransformationClient.copyChunks(TransformationClient.java:127)
        at com.zimbra.cs.convert.TransformationClient.extract(TransformationClient.java:156)
        at com.zimbra.cs.convert.SocketTransformationStub.doExtract(SocketTransformationStub.java:68)
        ... 17 more