Khaled:
I sent you this bug report quite a while ago and neither of us could find a way solution to it, so I have been using an earlier version of MIRC with no problem. However, while discussing it with a friend more recently, he pointed out that clicking on the icons in the upper right hand corner was a Windows function, not a MIRC function. On a hunch, I ran the latest version of MIRC (7.77) through the compatability troubleshooter, and THAT FIXED THE PROBLEM! Why this should have even happened, I have no idea, but I thought I'd let you know in case anyone else has this problem.
Thanks