Created attachment 171357 [details] Screenshot and demo C++ Qt project OS X version: 10.8.2 Qt version: 4.8.1 Load shadow-blur-test.html in a QWebView. It renders two identical red squares with a drop shadow. The left square has a scale of 1 and the right square has a scale of 0.01. Expected: Both the left and right renderings should look the same. Instead: The left rendering is rendered correctly but the right rendering only has a drop shadow along the vertical edges. In addition, rendering the right square takes 13 seconds vs 1 millisecond for the left square. It seems that QtWebKit renders the shadow at a huge resolution and then downsamples afterwards. Workaround: Don't use the canvas transform API and do all transforms manually instead.
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