[libreoffice-users] display does not "keep up"

Good afternoonI am currently running LO3.3 on two Windows XP (desktop) machines
      and one Windows 7 notebook PC.On the desktop machines, when I scroll through documents, or use
      PageUp/PageDown, the display on the screenbecomes "broken" in the way that lines are 
overlapping, are
      displayed only nd half characters look drawn out like if someonewrote with a fountain pen on 
kitchen paper.If I switch to display ANY other open window and then back again,
      the text appears "normal" again.This happens ONLY on the two desktop machines, andONLY with 
LO. None of the many other softwares has/does ever cause
      anything similar.The notebook PC (Dell Vostro 3500) is working fine.(if anybody would ask 
about video cards etc. -I would have to
      do some research to find that information ...)Since ALL OTHER software except LO is working 
fine, I tend to
      assume, that this is something specific to LO.Is there maybe a setting/trick somewhere, that 
would solve this
      problem?(it has bothering me for years, since OO 2.xx)Thank you.
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