I'm working for my studies with the latest processing version which is
1.0.1 revision 0163

I'm just drawing some ellpise with same height and width, circles in fact
that are drawn on randomly values which are issued by the anlysis of input
sound. At some point it can just crash, I guess when there is a too high value.

This is the Exception error I get :

Exception in thread "Animation Thread"
java.lang.ArrayIndexOutOfBoundsException: 720
at processing.core.PGraphics2D.ellipseImpl(PGraphics2D.java:1057)
at processing.core.PGraphics.ellipse(PGraphics.java:1517)
at processing.core.PApplet.ellipse(PApplet.java:6965)
at ProjNSY116_analysis.cercle(ProjNSY116_analysis.java:78)
at ProjNSY116_analysis.draw(ProjNSY116_analysis.java:158)
at processing.core.PApplet.handleDraw(PApplet.java:1406)
at processing.core.PApplet.run(PApplet.java:1311)
at java.lang.Thread.run(Thread.java:619)

edit]
source code that has the problem

the error occurs on the ellipses function.

This should be fixed in 1.0.2 with the repair of bug #1086.