I have just taken a bit of time to look into something that has been bothering me for a while. When you click the 'thanks/like' button on a post the hover message changes to 'Click here to remove your like/thanks from this post'. But it doesn't work.
I had a dig around in the default code and found that button had been bundled with a bunch of disabled state buttons in the CSS which would disable interacting with it. I have overwritten this and can confirm that this works as expected.
The change will go live as part of the next release which will happen sometime after the new year (along with a few other things that I will communicate in due course).
For those who are curious or would like to implement a temporary fix to their custom stylesheet (custom user themes guide), this is the CSS rule to enable the revoking of the thanks/like point from a post: