How do I mend Openoffice?

[Seakat]

I upgraded recently from Kubuntu 7.04 (Feisty) to 7.10 (Gutsy), and this
also upgraded OpenOffice2.0.2 (I think) to 2.3.1. Now Ooo is badly
broken. Using KDE, Write displays only part of the text (but it is still
there), and the icons on the toolbars have disappeared. In Calc, the
line heights have become tiny, and when teased apart, the text remains
invisible (but it is still there in the entry window on the toolbar).
(Running in Gnome the problem is similar except that the tool bar icons
are still there). Strange horizontal red lines appear in both Write and
Calc. Impress shows the images, but only occasional bits of text. Even
worse, when Ooo is loaded my computer slows right down and heats up. Is
there a way out, please? However I have installed Ooo 2.3.1 on XP _SP2
running in VirtualBox on Kubuntu, and there is no apparent problem there.
Otherwise, I've been a Kubuntu user for about 6 months, and it's just great!