[Leica] Strange Characters on Firefox Tab Corners

[Jim Nichols]

For several weeks now I have noticed strange characters appearing from 
time to time on the corners of Firefox tabs,  I am using Firefox 
36.0.1.  Here is a screen shot of today's example, with more characters 
than usual.  The only way I have found to remove these is to power the 
computer down completely.  A simple restart won't do it.

http://www.gallery.leica-users.org/v/OldNick/Strange+Characters+on+Firefox+Tab+Corners.jpg.html

Has anyone else encountered this?

I sent a comment to Firefox, but have heard nothing from them.

I have not seen this with any other software other than Firefox.

I am running Windows 7 on a Dell desktop computer.

-- 
Jim Nichols
Tullahoma, TN USA