1. boolean wkey = false;
2. boolean skey = false;
3. boolean akey = false;
4. boolean dkey = false;
5. boolean shiftkey = false;
6. 
   
7. void setup() {
8.   size(100,100,P2D);
9.   noStroke();
10.   fill(0);
11. }
12. 
    
13. void draw() {
14.   background(255);
15.   textAlign(LEFT,TOP);
16.   text("W: " + wkey,0,0);
17.   text("S: " + skey,0,10);
18.   text("A: " + akey,0,20);
19.   text("D: " + dkey,0,30);
20.   text("Shift: " + shiftkey,0,50);
21. }
22. 
    
23. void keyPressed() {
24.   if(key == 'w') {
25.     wkey = true;
26.   }
27.   if(key == 's') {
28.     skey = true;
29.   }
30.   if(key == 'a') {
31.     akey = true;
32.   }
33.   if(key == 'd') {
34.     dkey = true;
35.   }
36.   if(key == CODED) {
37.     if(keyCode == SHIFT) {
38.       shiftkey = true;
39.     }
40.   }
41. }
42. 
    
43. void keyReleased() {
44.   if(key == 'w') {
45.     wkey = false;
46.   }
47.   if(key == 's') {
48.     skey = false;
49.   }
50.   if(key == 'a') {
51.     akey = false;
52.   }
53.   if(key == 'd') {
54.     dkey = false;
55.   }
56.   if(key == CODED) {
57.     if(keyCode == SHIFT) {
58.       shiftkey = false;
59.     }
60.   }
61. }

1. void setup() {
2.     size(200,200,P3D);
3.     noStroke();
4. }
5. 
   
6. void draw() {
7.     background(0);
8.     pushMatrix();
9.     translate(mouseX,mouseY,0);
10.     fill(255,0,0);
11.     sphere(20);
12.     popMatrix();
13.     hint(DISABLE_DEPTH_TEST);
14.     fill(50,0,0,100);
15.     rect(0,0,100,100);
16.     hint(ENABLE_DEPTH_TEST);
17. }

1. int srad = 0;
2. int boxX = 0;
3. 
   
4. void setup() {
5.   size(400,200,P3D);
6. }
7. 
   
8. void draw() {
9.   background(0);
10.   pushMatrix();
11.   translate(width/2,height/2,-1000);
12.   noStroke();
13.   fill(200);
14.   sphere(height/2);
15.   srad = floor(screenX(height/2,0,0) - width/2);
16.   boxX = (mouseX - width/2) * (srad/(height/2));
17.   translate(boxX,0,height/2);
18.   fill(50);
19.   box(height/100);
20.   popMatrix();
21. }
22. 
    
23. void mouseClicked() {
24.   println(mouseX - width/2 + " * (" + srad + "/(" + height/2 + ")) = " + boxX);
25. }

1. float rotx = -PI/10;
2. float roty = PI/10;
3. 
   
4. void draw() {
5.       size(setWidth, setHeight, OPENGL);
6.       background(0);
7.       pushMatrix();
8.       translate(width/2,height/2);
9.       rotateX(rotx);
10.       rotateY(roty);
11.       box(50);
12.       popMatrix();
13. }

1. Could not run the sketch (Target VM failed to initialize).
   For more information, read revisions.txt and Help ? Troubleshooting.

I have found that even in a blank script with only the problem part of the script and declarations for loopvar, lx, and ly that it does the same thing, so I'm almost sure the rest of the script isn't causing this.