Thanks for the response above.
I wanted to ask if:
(1) You think that internal links were the main reason that you were affected by Penguin?
(2) What changes did you make to your internal links? How did you change them?
(3) When did you your rankings start to improve? Soon after the internal links were recrawled or after a Penguin run?
(4) What on-site changes did you make in addition to internal links?
I am asking these questions because I think that internal links might be affecting me and maybe some other on-site factors.