"In the middle"? Is it appearing at random places or always in a similar relative place (like near the end)?

Do you often copy and paste things from Microsoft Word into your e-mails? Or perhaps insert text files into your messages? I ask because that looks suspiciously like a Word formatting command or field code to me.

Alternatively, if these people are Outlook users, perhaps it is adding this, not Pegasus. Outlook defaults to using Word as it's message editor.

I recently installed Pegasus under Win XP SP3.  When I reply to plain text messages  from others, all seems well, but when they reply back to me, I sometimes see the following in the middle of what I sent to them:

{SEQ CHAPTER \H \R 1}

 This has happened about 3 times in the last few days.

 How can I prevent this?