Of course the funds use the closing price. Also, I don't understand all this talk about the month end and fund prices since they would normally be providing quarterly statements to their shareholders, not as of 10/31. I would expect that any tax related trades have been done some time ago.
Here is PROOF that accounting irregularities are still going on behind the closed doors. "A third objection by JPMorgan Chase Bank regarding how Kmart should account for the transaction was rejected by Judge Sonderby."
Why on earth would JPM care how the transaction was booked.