When I view http://processing.org/learning/basics/sprite.html in Firefox on
Ubuntu 9.04 Jaunty Jackalope, it works briefly but soon my the graphics on
my desktop go crazy (pixels and rectangles everywhere, flashing), and need
to either re-start my system, or, in some cases, physically re-boot the
computer.

I have now experience a similar entire-system-crashing problem when playing
around with a simple program in the Processing IDE (i.e. this time not on
the web) that draws a couple of ellipses.

This is a showstopper ... I can't use this software at all.

I am experiencing the same issue. This is caused by using the scrollbar in
Firefox 3.0.11. If I hit "Page Down" to view the source of the demos it
does not occur.

I have found that this is due to the use of Compiz. If you disable it the
problem goes away. The next thing to figure out would be is this a
Firefox, Compiz, Display Driver, or Processing.org issue?

(In reply to comment #2)
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> Additional Comment #2 From
> Matthew Purland
> 2009-07-10 09:18
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> I am experiencing the same issue. This is caused by using the
scrollbar in
> Firefox 3.0.11. If I hit "Page Down" to view the source of the demos it
> does not occur.
>
>

*** Bug 1249 has been marked as a duplicate of this bug. ***

This is not a Processing bug, as there is nothing we can do from Java to
interact with the hardware at that level. Most likely it's bad interactions
between Java, X, drivers, and your graphics card.