I'm not sure what to make of this. First of all instead of being in my spam folder it was in my inbox. I'll show the headers and maybe someone has an idea, this is from "view all headers" in Kmail:
It would appear that your mail client decided to treat the spam score as a QP encoded text character.
42 is decimal for ASCII "B", and QP characters are encoded by = followed by 2 digits.
=42.8 decodes to B.8
X-Spam-Status: Yes, hitsB.8 required~0 testsŤ_URI_RBL,AM_BODY_PLING,
BAYES_99,HTML_MESSAGE,MIME_HTML_ONLY,OB_URI_RBL,RCVD_IN_DSBL,
Below is when "viewing msg as plain txt"
X-Spam-Status: Yes, hits=42.8 required=5.0 tests=AB_URI_RBL,AM_BODY_PLING,