Solved! Go to Solution.
This is extremely useful insight Alok. I've been so annoyed by this error for so long. Glad to see there's a simple solution.
I had the same problem and thought it was only when "padding" was applied to paragraph tags.
The error is rather vague and did not point me to what the underlying problem was - I used it appropriately, why is it kicking it back?
Now I know.