Vista Media Center Recording Errors

Hello,
I have a client with a PC running Vista Ultimate who relies on the Vista
Media Center TV recording from a Dual Analog tuner using a cable signal
source.

The symptom is that the vast majority of scheduled recordings are split into
multiple pieces. The user was trying to clean up his pc so we clean
formatted the harddrive and clean installed Vista, and before installing any
applications we simply patched windows, installed the latest drivers
including for the TV Tuner, but the issue persists. The event viewer shows
entries similar to the following:

Log Name: Media Center
Source: Recording
Date: 5/5/2008 8:42:00 PM
Event ID: 3
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: xxx-PC
Description:
Recording of <showname> began late on 05/05/2008 20:28:01 due to a temporary
failure caused by either a system malfunction or a power loss and was stopped
due to a lack of audio/video data. Another recording attempt will be made.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Recording" />
<EventID Qualifiers="0">3</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2008-05-06T03:42:00.000Z" />
<EventRecordID>31</EventRecordID>
<Channel>Media Center</Channel>
<Computer>xxx-PC</Computer>
<Security />
</System>
<EventData>
<Data>Recording of <showname> began late on 05/05/2008 20:28:01 due to a
temporary failure caused by either a system malfunction or a power loss and
was stopped due to a lack of audio/video data. Another recording attempt will
be made.</Data>

<Binary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inary>
</EventData>
</Event>

The PC is a DELL E510 with 2GB RAM, plenty of hard drive space and is fully
patched (But not upgraded to SP1 because the SP1 audio driver is not ready
yet). The TV Tuner is identified in Device Manager as a "Angel MPEG Device"
and is made by Luminate, Inc.

I appreciate any help you can provide to help resolve this issue