[roger]

I've got a bit of a problem that I've been chasing for ages and have gotten nowhere. The applet I've written uses a large image (typically in the order of 2000x2000 and up, embedded into a scroll pane) to display large amounts of data graphically. The system works fine, but sometimes the image corrupts as soon as you do some scrolling (i.e. and the paint() method is called).

I can reproduce the problem with a given set of configuration parameters for the applet, but I can't reproduce it on anyone else's laptop. It was doing it on JRE1.5.0_06, so I uninstalled it and installed JRE1.5.0_07 and it still does it. On a colleague's laptop on JRE1.5.0_06 it does not occur. Another is using JRE1.5.0_03 and it does not occur. We noticed that the problem was also more prevalent in 1.5.0_05. This sounds like it might be a local issue, but I am completely stumped.

Does anyone have any ideas why this might happen?