Custom product meta tag does not work

[wlanguide]

I am not sure if this is the right place to start this thread, I have searched the forum and tried Google, but my problem isn't solved.

So this is my problem, I have a few website in different languages, all upgraded from 1.38a to 1.39h.

They all have the same problem, after adding a few products with meta tag working correctly, the meta tag stops to work, even if I define them in product meta tag.

I can see from the database using phpmyadmin that the meta tag is correct, but the product page still shows the default title, namely product name, price etc.

I tried to switch to the default theme without luck. I also tried to add the meta tag selecting English as the default language, but it did not work either.

Thanks for any help.