Nonetheless, Nasdaq has subsequently modified the IPO Cross process so it no longer accepts orders after the auction's final calculation has been made.

Nasdaq has rules in place to handle disputed transactions, in which brokers can petition the Nasdaq for losses due to system failures. The company has put aside $13 million for claims. As of Monday, however, Facebook share prices have dipped below the IPO price of $38 per share, and in the midafternoon were trading at $33.64.

The IDG News Service