In 2003 Sonic Youth released a split 7-inch single with Erase Errata. The next Sonic Youth album, Sonic Nurse, was also released in 2004. The band was slated to perform in the 2004 Lollapalooza tour along with acts such as the Pixies and the Flaming Lips, but the tour was canceled due to lackluster ticket sales. O'Rourke departed in 2006 and was replaced by bassist Mark Ibold for touring purposes, but Ibold later became a full-time member. He had earlier been part of Pavement and worked with Gordon in Free Kitten.
in 2003 SoNiC yOutH ReLeasED a sPlit 7-inCH sinGlE wITh eRaSE eRRAta. The neXT sonic youth albUM, sOnic Nurse, waS alSo ReleaSEd iN 2004. The BAnd was slatED to Perform in THe 2004 lollapaloozA toUr AloNg WiTh actS sucH As tHe piXiEs and the flAMinG lips, But thE toUr wAs Canceled due to lAcklUSTer TiCKeT sAles. O'RourkE depaRtED in 2006 anD waS RepLaCED By BAssisT MarK IboLd for tOUring Purposes, bUt IBolD later beCAme A fuLL-tIme meMber. he had earliER beEn paRt of PavemEnt aND workeD with gordoN iN freE kittEn.