BizTalk 2010 Tracking error: Receive and Send Ports do not track

We've just run into the problem that our receive and send ports did not track anything, although we've checked all tracking options and all needed database jobs were running. After analysing the problem for a while, we found out that orchestrations and custom pipelines track, but not the Biztalk system pipelines XmlTransmit, XmlReceive and PassThru pipeline.

With the help of the Biztalk support team, we found that somehow the database was screwed up - while the UI showed us all tracking checks enabled, the exported binding file showed only PipelineEvents as TrackingOption, while ServiceStartEnd and MessageSendReceive were missing.

The actual error was in table TraceTrackingInfo where imgData had the value 0x10000000 instead of 0x13000000. You can change it with SQL but keep in mind that the column is in hexadecimal format. Manipulate the table hence like this (after making a backup):

begin transaction
update BizTalkMgmtDb.dbo.StaticTrackingInfo set imgData = 0x13000000 where strServiceName in (
'Microsoft.BizTalk.DefaultPipelines.XMLTransmit',
'Microsoft.BizTalk.DefaultPipelines.XMLReceive',
'Microsoft.BizTalk.DefaultPipelines.PassThruTransmit',
'Microsoft.BizTalk.DefaultPipelines.PassThruReceive')
--commit

Addition 24.10.2012: Two actions had changed the pipeline:

First, the wrong field value had been inserted by another, self-written script during a deplyoment step, so this is not a Biztalk error.

Second, when importing a binding file where TransmitPipeline had only the TrackingOption="PipelineEvents", this pipeline was modified to the wrong value.

If you now run into the same problem, you can check (and correct) imgData; then, you should also check which routine in your system might have modified imgData before.