Bug 795796 broke BananaBread rendering. The demo renders a few frames then renders nothing for a long time, then perhaps a few more frames, and so forth. Apparently the game continues to run, because the event loop is responsive (escape bumps you out, space to jump plays the jump sound, etc.) - it is just that frames are not rendered. Biscection narrowed this down to The first bad revision is: changeset: 108706:beee809b7ade user: Matt Woodrow <mwoodrow@mozilla.com> date: Mon Oct 01 17:29:02 2012 +1300 summary: Bug 795796 - Fix empty transactions. r=cjones BananaBread link: https://developer.mozilla.org/en-US/demos/detail/bananabread

Jeff, it would be nice if a WebGL reftest could catch this.

Is this accelerated layers only? Probably bug 796183

Yes, when I disable accelerated layers the regression vanishes.

Yup, this looks fixed now (local build of m-c, not yet in nightly) after bug 796183 was just resolved. Thanks Matt!