Funky characters in KMail 1.5.4

[Gerard Samuel]

Im not sure what to google for, so Im checking here to see if any other 
FreeBSD users experience this.
Every now and then my emails that I send contain extra characters like
=2D and =46
I have no idea what is causing it, and Im hoping someone on here can direct me 
to something on the net to help me correct this.

Thanks for any advise you can pass along...