Public bug reported:

Binary package hint: libreoffice

When I have word document opened in libreoffice for more than a day, after that 
time the scrolling of the scroll bar takes a minute to finish. Redrawing the 
screen seems to fail, in the sense that subsequent sentences are overlapping 
(showing only half of one of them)
I cannot produce a screenshot, because the process consumes more than 50% cpu. 
To describe what happens, imagine a scroll of half a page or so: it start the 
scroll, hampers on redrawing the bottom lines (when scrolling down), then 
finishes after about 10 seconds with >50% cpu activity. When it reaches its 
'destination', it restarts from the beginning (top) and show the same behaviour 
several times.

I have this problem with a word .doc file and adding comments to text,
but I do not know if this is related.

I have switched off the 'java' option in the preferences (having read about 
that solving the problem somewhere), but that doesn't help.
 
closing and reopening the document resolves the problem: fast response to 
scrolling the mouse.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: libreoffice-core 1:3.3.2-1ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia wl
Architecture: amd64
Date: Thu Jun  9 10:04:24 2011
ExecutablePath: /usr/lib/libreoffice/program/soffice.bin
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 LANGUAGE=en_GB:en
 LC_CTYPE=C
 PATH=(custom, user)
 LANG=en_US.utf-8
 SHELL=/bin/bash
SourcePackage: libreoffice
UpgradeStatus: Upgraded to natty on 2011-05-05 (34 days ago)

** Affects: libreoffice (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty

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https://bugs.launchpad.net/bugs/794900

Title:
  libreoffice slow on screen scroll and retries the scroll several times

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