When interacting with http://www.ibiblio.org/e-notes/webgl/deflate/ship.html with TextureMapperGL enabled, the canvas content does not update after the first render. It seems that Nvidia cards require manually rebinding to the multisampling FBO after multisample resolution. This is likely because the texture cannot be active on two framebuffers at once. This does not seem to be an issue for my Intel driver.
Created attachment 144659 [details] Patch
Comment on attachment 144659 [details] Patch Ok let's try this!
Comment on attachment 144659 [details] Patch Clearing flags on attachment: 144659 Committed r119882: <http://trac.webkit.org/changeset/119882>
All reviewed patches have been landed. Closing bug.