I have a sketch that runs without problems using Processing 1.09.
With Processing 1.1 I receive the following error message:
unexspected token: aRectangle

and

processing.app.debug.RunnerException: unexpected token: aRectangle
at processing.app.Sketch.preprocess(Unknown Source)
at processing.app.Sketch.preprocess(Unknown Source)
at processing.app.Sketch.build (Unknown Source)
at processing.app.Sketch.build (Unknown Source)
at processing.app.Editor$DefaultRunHandler.run  (Unknown Source)
at java.lang.Thread.run(Thread.java:619)

The sketch is quite big (8 classes, lots LOCs), so I have to narrow the
problem down, which is not so easy in such a context.

Any advice how to do that and for what to look, probably with some background knowledge of 1.1 ?

Sorry for not providing sufficient information. I tried to be precise and did not want to produce too much information noise.

I did read the release note of 1.1 and indeed imported java.awt.Rectangle and tested that with 1.09 and 1.1.
But: The import-statement is in a processing tab, which holds a class, but outside the class definition. Rectangle is only used in the class
of that tab.

Looks something like this:

import cl.eye.*;
import hypermedia.video.*;
import java.awt.Rectangle;
.
.
OpenCV opencv;
.
class cam{
 boolean movement;
 cam(){
 }
 boolean detectedFace(){
   .
   .
   Rectangle[] faces = opencv.detect( 1.2, 3, OpenCV.HAAR_DO_CANNY_PRUNING, 40, 40 );

     for( int i=0; i<faces.length; i++ ) {
     rect( faces[i].x, faces[i].y, faces[i].width, faces[i].height );
     face=true;
   }
   return face;
 }

I thought this is legal and should work.
Reading your comment I changed that and copied the java.awt.Rectangle import to the main tab of my sketch: Now it works also with 1.1: Surprize! at least for me.
I dont understand why, was just a guess. Could you explain please?

Thank you for your effort.
So we will leave this as is: A mystical behaeviour in my sketch..and
their is probably something else in my sketch, that I dont see, somehow interfering with this import statement.