Igor, The following test is repeatable on both my Vista and W7 PCs in V7.0.7 and V7.5.3 and results in the anomaly seen below. Open a NEW PROJECT. Set KFSD on and Slide Duration and Transition Time to 8 seconds and 2 seconds respectively. Add 3 Blank Slides. Open Slide 2 (or 1) in O&A and add an object. Set KFs at 2 second intervals i.e 6, 8 10, 12 and 14 seconds. Go to Customize Slide. Tick Scale KFs and adjust Slide Duration to 16 seconds. The result is shown below. The penultimate slide i