I'm guessing this does not apply to everyone, as I'm certain someone would of mentioned it. I tried searching and didn't see this specific issue.
When adding a product attribute I suffer a problem where at form submission I get "This is a required field" directly below the attribute list, despite the field being entered properly.
I found a workaround for this is to add a blank attribute, then delete it. The form then will submit successfully.
-Justin
