Mishnah Berurah 558:3 records a custom to continue the restrictions of the 'Nine Days' regarding bathing, haircuts and laundering clothing until midday of the tenth of Av.
Is this list exhaustive? What about other restrictions of the Nine Days which he doesn't mention? I'm thinking particularly about wearing clothes which were laundered before the Nine Days and have not been worn since (which are restricted during the Nine Days as per Shulchan Aruch 551:3).