If you hover over the footer in Chrome/OS X (maybe other platforms as well?), the Wolvic logo in the header goes from smoothly joined polygons to stair-stepped slightly-separated polygons. Literally the only change is that the SVG element in the footer is made invisible. Nothing else is done to the page.

Hypothesis: the presence of path elements in the page forces a different rendering.

Note: the hover state (the slightly separated polygons) is the only rendering I’ve been able to get in Firefox and Safari (both OS X). Hovering the footer make no difference.