Wrong sprite position in Crosswalk

I have a very low resolution game (56x32). It runs fine in Chrome for Android on my tablet, but when using Crosswalk the sprite's positions are all messed up. Usually by only once pixel, but this game is low resolution and I'm using pixel rounding so it becomes completely broken.

Here is a screenshot of how it looks in Chrome for Android, the way it is supposed to:

http://i.imgur.com/ZFbqI9R.png

And here is a screenshot of how it looks in Crosswalk:

http://i.imgur.com/fpDvjv7.png

The entire background seems to have moved up by one pixel, and notice how some of the borders are messed up.

Any way to prevent this?

Oh and if you wanna try the game out yourself, here it is:

https://dl.dropboxusercontent.com/u/826 ... index.html