Strange Character Text in Email

When I send an encrypted email to another person, then they reply back using another email encryption software; why do we see the following strange character text in the email.

I don’t fully understand
James R. Palmer           Â

Note: we both are using Outlook 2007.

Hi Rszakacslng,

Please provide next information:

  1. Comodo SecureEmail (CSE) version.
  2. Which mode of CSE is selected (LSP or Outlook plug-in)?
  3. Which another encryption software your recipient have installed? (and version number)
  4. Can you attach this e-mail (or create test e-mail and do the same actions) to this post?

Thanks in advance.