After Todd breaks BoJack's bed in the third episode, the opening title sequence shows the corner of the bed being held up by books.
After Sarah Lynn burns BoJack's ottoman, the opening title sequence depicts this change to BoJack's apartment.
After BoJack steals the D from the Hollywood sign and the D is destroyed in a helicopter accident in "Our A-Story is a D-Story", the theme song has the Hollywood sign forever missing the "D".