In the setup dialog for the Like-Button, there are only two options for layout:
Unfortunately, the numbers
Most of the suggestions are now, no longer valid.
The correct fix as of today, is to use the 'button' layout.
eg.
The FB Docs, seem not to be fully updated yet... if you scroll down you'll see they state only 3 layouts are available, yet the dropdown suggests 4.
This means you can now use a less hacky solution!