Thank you, sir, for looking into this. I meant no disrespect. I will give more info below that may help.
I have the same "box in the upper left" (I'll call it a panel) problem on two different computers; one uses windows 2000, the other is Vista. I also have the same problem with Pretty Pictures, if that helps. PP worked really well on windows 2000 for months, then it didn't (I think the problem started when I moved MM to an external hard drive, but will have to check if you think it is relevant) and in the process of reinstalling MM I got the panel.
I have had the panel with Behind Title Bars from the beginning, but the script works just as it should. It seems like the panel sits on top of MM covering most of the toolbar. I can click on Tools, use the left arrow to navigate to Play, View, Edit, and File.
I can't think of anything else that is common to the scripts or systems. I may try someone else's solution using the Song Info Panel script and see if that does anything. Thank you again for your hard work.
Edit: I know next to nothing about what I'm about to tell you, it's just information. Going to the "Persistent" registry as has been suggested here showed me that I had a couple items there that I think shouldn't be, Pretty Pictures and Monkey Flow, neither of which is installed. I deleted both, not only in Persistent but their actual folders under \Toolbars\. Monkey Flow is gone and stayed gone, but Pretty Pictures kept showing up in the Persistent folder. I deleted and restarted MM numerous times, each time going to the register and deleting PP, and now the panel seems to be gone. This was all done on the Windows 2000 system. The Vista has Monkey Flow installed and working before I added this script and Pretty Pictures was not in the registry. Not sure what to do next but will play with it.