Created attachment 194630 [details] Code to repro the bug This problem seems to manifest when: * A CSS rule uses an attribute selector to apply a filter effect. * The filter effect is a reference to an SVG filter. * The element that the effect is applied to changes its class name - the filter should be unaffected, but it's lost. Minimal repro attached. Bug repros on all current versions of Chrome from stable to Canary. Tested on Mac OS X, with hardware acceleration enabled.