Originally reported in Chrome, but also observed in Safari 5: http://code.google.com/p/chromium/issues/detail?id=84325 1. Go to http://upload.wikimedia.org/wikipedia/en/5/55/X-MenFirstClassMoviePoster.jpg 2. Zoom the image using the mouse till it's bigger than your screen size in both width and height 3. Click the image (the cursor showing a hand lens with a 'plus' (+) on it). The image enlarges. 4. Now, press Ctrl + 0 What is the expected result? The expected result is the image to resize to it's original size. What happens instead? Instead, the image is larger than it's original size. And even when the image is lowered to it's original size (which is actually smaller than the original size interpreted by Chrome), and then Ctrl + 0 is pressed, the image returns to its larger-than-original size. See also: http://code.google.com/p/chromium/issues/detail?id=31578 http://code.google.com/p/chromium/issues/detail?id=65011 Which roughly correspond to Webkit bug 18051: https://bugs.webkit.org/show_bug.cgi?id=18051
I don't see a way to zoom with cursor in Safari, but I can certainly reproduce with Cmd-"+" and Cmd-"-".