Unable to generate og:image I have installed the Metatag module, along with ImageCache Token, but it just does not work. 

I have tried many of the different available tokens in the Open Graph image field for my node, and none of them generate a og:image tag. For instance, I have tried:    

[node:my_image]
[node:my_image:large:path]
[node:my_image:large]
[node:my_image:thumbnail]  

if I hard-code a URL rather than use a token then it works, but that rather defeats the purpose. My logs contain no errors, and I remember to clear the cache each time. This is driving me nuts. Anyone know what might be wrong?
Check that your image has at least 200x200 as defined in the error provided by Facebook debugger.
Also use Ctrl+U in your browser to check that the og:image tag print the correct url