Comment 8 for bug 392066

I think I can help with this. I just had exactly the same problem of the disappearing line.

I used "samford ss - intro and e&e" as the task name (which appeared with the - Unsorted on the end when double clicked.

For some reason this task name consistently causes the error. I'm not sure what is wrong with the task label but its a 100% repro - Everything works fine if I use a different task name but there is something in this particular task name that results in the task box appearing blank and hence the thin line problem on the panel.

the '&' is the obvious suspect given this thread but it usually works fine.