No, never.

I went once to England, and had no any question when I came back. In fact, when you got green card, H1b automatically invalid. On the other hand, when you submitted the H1b extension application, the green card had not been approved, so that your H1b extension application is legal. It is INS's due to stop the H1b extension process if they issued green card, so don't worry about it.
This phenomenum may be because that H1b and green card are belong different groups to treat it within INS, but they never exchange information each other.