Neither. Maybe a virus/trojan. Now kaspersky 2013 is scanning files.... Some hours needed.
I have those strange characters also in mirc 6.17 without additional scripts, and also in xchat and kvirc.
And those characters in mirc were increasing when i went on beppegrillo dot it site with internet explorer 9 browser.
Many clones popups browser windows were coming, and a pc restart was needed.
Last edited by meow81; 19/03/13 05:36 PM.