Ubuntu Multimedia :: OpenOffice Makes Video Refresh And Gnome Crash?

Since upgrading to Lucid a few days ago I'm having intermittent problems (90% of the time)with opening OpenOffice files.When I open up a spreadsheet (.ods) in OO, (whether OO was already open or not) my screens go black, then flash on and off for 30 seconds (ish) as if trying to change the refresh rate.Sometimes this results in Gnome crashing and restarting itself. it settles down and is OK. On a few occasions I have had to change terminal and manually restart gdm.

Here's my environment;

Dell Latitude D620
nVidia GeForce Go 7300 (according to hwinfo)
Ubuntu Lucid 32-bit (upgraded from Jaunty)
2 GB RAM

I've got the recommended "NVIDIA accelerated graphics driver (version current)" hardware driver and the NVIDIA X Server Settings applet, which says my NVIDIA driver version is 195.36.24. I'm running dual screens (1440x900 and 1280x1024) using TwinView. After a flicker, here is what I find in the Xorg.0.log;

Code:

(II) Jun 30 12:17:42 NVIDIA(0): Setting mode
(II) Jun 30 12:17:42 NVIDIA(0): "CRT:nvidia-auto-select+1440+0,DFP:nvidia-auto-select+0+124"
(II) Jun 30 12:17:43 NVIDIA(0): Setting mode

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