Browsers are going to keep breaking from here to forever. What gets me is Ashley updating to a version of node that had severe, obvious problems. And sticking with it for no apparent reason (It has 64bit export! More bits!).
It's easy enough to swap, but we shouldn't have to bother. I've said it before: C2 ought to commit to maintaining compatibility with the last 2 or 3 versions of node-webkit.
Intel XDK, for example, allows you to export with stable, beta, and alpha versions (all based on different versions of chromium). IIRC, you can also choose to export using older stable versions. Bottom line: you have a choice.
It's worth saying that chrome 39, the current stable, isn't bad. It's not completely smooth, but it's not as inconsistent as Canary, which, in its defense, is an alpha release.