I have my drive toolbar vertically between dual listers. When I moved them to one side and back, this is what I got:
When you cursor over them, strange things happen. Sometimes they clear up, as you can see in two of the icons. Sometimes the drive label seems to be written on top of something else or echoed. Closing the program and re-launching fixes the issue.
BTW, is this where you want DO9 undocumented features reported?
D.