From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5)
Gecko/20041103 Firefox/1.0RC2

Description of problem:
When opening an item such as a launcher from a panel, a vertical
yellow line about 2-3 pixels thick appears at the right edge of the
screen. Launching the same application (such as a shortcut to the
Terminal) alternates between normal view and that with the yellow bar
appearing.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Click on a launcher from a panel.
2. If yellow bar does not appear, then click on the launcher again.
3.
    

Actual Results:  I see this yellow line appearing at the right edge of
the screen.

Expected Results:  The application should have opened without creating
that yellow line.

Additional info:

I note that this does not happen when opening an application from the
Applications menu