Some lame clients or scripts will send every line of text with a color code at the beginning. If the color is the same as another person's background color, that person will be unable to see it. If they were using mIRC versions up to 6.16, they could still see the text by highlighting it. In 6.17, this doesn't work any more, thus forcing them to copy/paste to see what was said.
To test it out type: //echo $chr(3) $+ 0,0invisible and try to highlight the resulting line. It works in 6.16 but not in 6.17.
