George it is definitely 605. See below.
Log Name: Application
Source: Directory Synchronization
Date: 7/26/2013 10:12:52 AM
Event ID: 605
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: domain.domain.local
Description:
The following password changes failed to synchronized and have scheduled for retry.
DN = CN=temp user,CN=Users,DC=domain,DC=local
Event Xml:
<Event xmlns="schemas.microsoft.com/.../event">
<System>
<Provider Name="Directory Synchronization" />
<EventID Qualifiers="0">605</EventID>
<Level>4</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="7/26/2013T17:12:52.000000000Z" />
<EventRecordID>5643234</EventRecordID>
<Channel>Application</Channel>
<Computer>domain.domain.local</Computer>
<Security />
</System>
<EventData>
<Data>The following password changes failed to synchronized and have scheduled for retry.
DN = CN=temp user,CN=Users,DC=domain,DC=local
</Data>
</EventData>
</Event>