I have HTML syntax highlighting "on" and have a horrible problem occurring. When I highlight a section by "clicking, holding, and dragging" my mouse across text, and then click away from the selection, those words have vertical lines after them (the same color as my "Sel. Text Background"). Another terrible scenario seems to occur when I don't even select anything at all. Extra characters appear on the screen like semi colons. These are not actual typed characters at all and as long as I don't use syntax highlighting I don't see either of these problems. I have found that if I turn on "Show spaces/tabs" with the syntax highlighting I have no problems but I then cannot read the material very well that way either. I have reproduced this problem on two monitors and one machine. I cannot reproduce this on my laptop or my co-workers machine. I've tried changing resolution and color depth with no change. I've talked to my IT guy and he asked me to post the problem to see if this is a known driver conflict or otherwise known problem. I am using 10.20C although this has been a problem for several versions back over a couple of years. Please help. I cannot use syntax highlighting at all and don't want to switch from using UltraEdit as I've grown to love it but will have to if I cannot resolve this problem as I am using it to develop multiple websites with .htm, .js, .asp, .css... Thanks.