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Hello all. I have been using your fine library to animate a set of banner ads for a client going live soon. Fairly late in this process, a team member discovered a 1 pixel jitter or wiggle only in Safari. We are using Google DoubleClick, and we also have a private viewer to show clients ads. In both cases, after uploading these animated ads, in Safari the ad will shift back and forth by about one pixel while elements in it are animating. To phrase it in a different way, when the ad is on a page within an iFrame, the iframe or possibly the container it's in shifts side to side in a wiggle by about one pixel. The animations display slightly differently in Safari as opposed to Chrome. This is not as significant as the jitter. This has been found in Safari Version 9.0 in OSX El Capitan and Yosemite. I stripped the ad of any client-specific images, text, or information and uploaded it to CodePen to try and isolate what's going on. I also had to strip out all the DoubleClick specific code because CodePen would not allow it to run with that code. I really have to apologize because this is very ugly at the moment as I try to debug this. So far I have not been able to get the iframe to jitter in CodePen. However in the "Details" view, the animation is affecting the font weight of the page header text! I feel like this is related. I am at wits end. I'm hoping that if you look at it here and can understand why the font is changing during animation, it will help me understand why the ad is affecting its container during animation in Safari. EDIT: To be clear, right now the behavior I'm asking for help debugging is in CodePen, that the font weight of the header in the top left is flickering during the animation of my banner ad. I think this must be caused by the same thing that is making it jitter in Google DoubleClick preview and in our internal adviewer page, which also uses iframes. Any help would be much appreciated. Best, Stephen Link: http://codepen.io/stevium/details/WQdEyG/