It started doing this in a group text I had going for a few days.
--__CONTENT_64564_PART_BOUNDARY__33243242__
Content-Id: <0.smil>
Content-Type: application/smil;Name="123_1.smil"
Content-Location: 0.smil
Content-Transfer-Encoding: 7bit
<smil>
<head>
<layout>
<root-layout width="240" height="160"/>
<region id="Image" width="100%" height="67%" left="0%" top="0%" fit="meet"/>
<region id="Text" width="100%" height="33%" left="0%" top="67%" fit="meet"/>
</layout>
</head>
<body>
<par dur="8000ms"><text src="text_0.txt" region="Text"/></par></body>
</smil>
--__CONTENT_64564_PART_BOUNDARY__33243242__
Content-Id: <0>
Content-Type: text/plain;Charset="us-ascii";Name="text_0.txt"
Content-Disposition: attachment; filename="text_0.txt"
Content-Location: text_0.txt
So what's the deal tonight?
--__CONTENT_64564_PART_BOUNDARY__33243242__--
--__CONTENT_64564_PART_BOUNDARY__33243242__
Content-Id: <0.smil>
Content-Type: application/smil;Name="123_1.smil"
Content-Location: 0.smil
Content-Transfer-Encoding: 7bit
<smil>
<head>
<layout>
<root-layout width="240" height="160"/>
<region id="Image" width="100%" height="67%" left="0%" top="0%" fit="meet"/>
<region id="Text" width="100%" height="33%" left="0%" top="67%" fit="meet"/>
</layout>
</head>
<body>
<par dur="8000ms"><text src="text_0.txt" region="Text"/></par></body>
</smil>
--__CONTENT_64564_PART_BOUNDARY__33243242__
Content-Id: <0>
Content-Type: text/plain;Charset="us-ascii";Name="text_0.txt"
Content-Disposition: attachment; filename="text_0.txt"
Content-Location: text_0.txt
So what's the deal tonight?
--__CONTENT_64564_PART_BOUNDARY__33243242__--