Could you clarify what you're talking about? I don't see this bug in other windows inside mirc, nor have ever seen one in firefox or chrome. I usually see these bugs in poorly written small applications. That's why I'm surprised about this happening in mirc.
I hope I don't need to post a picture about this, it's very easy to reproduce.
Maybe it's easy for
you to reproduce but I see no differences between mIRC's scrollbar and any other program.
