QT programs (including whole KDE) with lines in several widgets

[Constantin Velásquez Guerino <cvelasquez.gnu@xxxxxxxxx>]

Hi all! I have a problem with QT programs like Opera or KDE, and I want to 
know how to solve it (if anyone can help me, because I tried but couldn't by 
myself). Principally menus has vertical lines like in the picture in 
http://canelo.homelinux.net/img/QTproblema-con-rayas.png (may not be 
available sometimes, I shut down the computer in night), and I have no idea 
why (really have no idea).

Please help.

-- 
Saludos, Constantin Velásquez.
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