LAME padding bytes query

Michael Aubrey <[email protected]>
Newsgroups gmane.comp.audio.mp3.lame
Message-ID <[email protected]>
Hi Folks,

My apologies to Gabriel if you've already seen this question via Sourceforge's contact system, but I've just found the email address to contact you all by the proper channel.
 
I'm trying to understand the reason why the LAME (3.82 encoder) padding bytes in an MP3 audio file I have alternate (sometimes) from 0x55 to 0xaa? Is this something you might be able to help with?
 
Many thanks for any advice you may be able to give me,
 
Mike Aubrey
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