exchange 2010 error message

I've searched all over the internet and can not find anything on this error.  Please advise, this just started showing up on my servers around 5 days ago.

Log Name:      Application
Source:        MSExchange Common
Date:          2/13/2013 2:33:26 PM
Event ID:      4999
Task Category: General
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      xxxxx.xxx.com
Description:
Watson report about to be sent for process id: 4540, with parameters: E12, c-RTL-AMD64, 14.02.0247.005, WS, M.Exchange.Services, M.E.S.C.D.MimeContentProperty.WriteMimeContent, S.IO.IOException, 33dc, 14.02.0247.003.
ErrorReportingEnabled: False
Event Xml:
<Event xmlns="
  <System>
    <Provider Name="MSExchange Common" />
    <EventID Qualifiers="16388">4999</EventID>
    <Level>2</Level>
    <Task>1</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-02-13T22:33:26.000000000Z" />
    <EventRecordID>110046</EventRecordID>
    <Channel>Application</Channel>
    <Computer></Computer>
    <Security />
  </System>
  <EventData>
    <Data>4540</Data>
    <Data>E12</Data>
    <Data>c-RTL-AMD64</Data>
    <Data>14.02.0247.005</Data>
    <Data>WS</Data>
    <Data>M.Exchange.Services</Data>
    <Data>M.E.S.C.D.MimeContentProperty.WriteMimeContent</Data>
    <Data>S.IO.IOException</Data>
    <Data>33dc</Data>
    <Data>14.02.0247.003</Data>
    <Data>False</Data>
    <Data>
    </Data>
  </EventData>
</Event>