--- apps/plugins/pictureflow/pictureflow.c	(revision 26408 + pictureflow-wps-11.patch)
+++ apps/plugins/pictureflow/pictureflow.c	(working copy)
@@ -1995,6 +1995,7 @@
 
     if (step < 0)
         index++;
+		rb->yield(); /*first random placed yield*/
     if (center_index != index) {
         center_index = index;
         rb->queue_post(&thread_q, EV_WAKEUP, 0);
@@ -2041,11 +2042,13 @@
         right_slides[0].angle = -(neg * itilt) >> 16;
         right_slides[0].cx = fmul(offsetX, ftick);
         right_slides[0].cy = fmul(offsetY, ftick);
+		rb->yield(); /*second random placed yield*/
     } else {
         PFreal ftick = (pos * PFREAL_ONE) >> 16;
         left_slides[0].angle = (pos * itilt) >> 16;
         left_slides[0].cx = -fmul(offsetX, ftick);
         left_slides[0].cy = fmul(offsetY, ftick);
+		rb->yield(); /*last random placed yield*/
     }
 
     /* must change direction ? */