aakk9999 - 10:12 pm on Jul 1, 2013 (gmt 0)
I think you can suffer OOP with overly optimised and repeating internal linking (using the same anchor text over and over).
This may happen more in case where you try to rank for a keyword phrase (e.g. two or three word phrase) and you repeat the exact phrase over and over again in your in-content internal linking, where it would not naturally flow in the language.
Perhaps you can try to de-optimise internal anchor text and see if you get any improvements?