It appears that around Jan 27, some people when hitting save page when editing a page, instead of editing the page, ended up creating a new page with the namespace in page_namespace, and page_namespace = 0. Many of these also ended up in the utterly incorrect tracking category "Category:Category:Pages with script errors", so namespace issues seem to be all around.
Compare for example: https://commons.wikimedia.org/wiki/File:PikiWiki_Israel_41226_Plants_of_Israel.JPG and https://commons.wikimedia.org/wiki/?curid=38058081
Issue seems to have stopped, does anyone want to investigate further (or have other ideas), or should we just tell commons to delete these pages.
Examples in file/commons namespace (they may be examples from other namespaces too [See also https://commons.wikimedia.org/w/index.php?title=Special:NewPages&offset=20150127000000&dir=prev&limit=87]):
MariaDB [commonswiki_p]> select page_id, page_title from page where page_namespace = 0 and (page_title like 'File:%' or page_title like 'Commons:%'); +----------+------------------------------------------------------------------------------------------------------------------------------------------------------+ | page_id | page_title | +----------+------------------------------------------------------------------------------------------------------------------------------------------------------+ | 38058985 | Commons:Deletion_requests/Files_uploaded_by_Nabila.selim | | 38058946 | File:AMA_(11155209545).jpg | | 38058381 | File:Bisected_coyote_skull.jpg | | 38058518 | File:D._Maria,_A_Louca.jpg | | 38058841 | File:Daniel_Barbu,_IEIS_conference_«The_Politics_of_Virtue,_the_crisis_of_liberalism_and_the_post-liberal_future»-002.jpg | | 38058133 | File:Georgi_Okoev-doctor.jpg | | 38058042 | File:Interieur,_kamer_voorzijde_beneden,_met_trappetje_en_deur_naar_de_opkamer_-_Bunschoten_-_20332877_-_RCE.jpg | | 38058237 | File:Interieur,_kapiteel_van_de_eerste_zuidelijk_middenschippijler_na_het_orgel_-_Gouda_-_20385853_-_RCE.jpg | | 38058286 | File:Interieur,_kastdeur_in_woonkamer_-_Lhee_-_20427243_-_RCE.jpg | | 38058306 | File:Interieur,_kastenwand_in_de_woonkamer_van_het_voorhuis,_tijdens_restauratie_-_Nansum_-_20414506_-_RCE.jpg | | 38058313 | File:Interieur,_kazuifel_-_Delft_-_20358132_-_RCE.jpg | | 38058376 | File:Interieur,_kelder_achterhuis-_stenen_trap_naar_begane_grond_-_Schijndel_-_20350143_-_RCE.jpg | | 38058383 | File:Interieur,_kelder_met_kruisgewelf,_zichtbaar_zijn_de_lies_en_geboorte_-_Harlingen_-_20379151_-_RCE.jpg | | 38058434 | File:Interieur,_kelk_-_Vleuten_-_20360316_-_RCE.jpg | | 38058438 | File:Interieur,_kelk_-_Waddinxveen_-_20378533_-_RCE.jpg | | 38058490 | File:Interieur,_kerkzaal_-_Heemstede_-_20421724_-_RCE.jpg | | 38058515 | File:Interieur,_keuken,_overzicht_van_gootsteen_en_tegelwand_-_Alphen_aan_den_Rijn_-_20415432_-_RCE.jpg | | 38058601 | File:Interieur,_keuken_op_begane_grond,_in_onttakelde_toestand,_voor_de_restauratie_-_Alblasserdam_-_20407777_-_RCE.jpg | | 38058609 | File:Interieur,_keuken_van_voormalig_varkenshuis_-_Winterswijk_-_20532595_-_RCE.jpg | | 38058665 | File:Interieur,_kleuronderzoek_-_Weert_-_20357424_-_RCE.jpg | | 38058672 | File:Interieur,_kleuronderzoek_in_de_kerk_-_Delfzijl_-_20530619_-_RCE.jpg | | 38058723 | File:Interieur,_koetshuis_met_gietijzeren_verdeling_tussen_de_paardenboxen_en_ruiven_met_namen_van_de_paarden_erboven_-_De_Bilt_-_20369604_-_RCE.jpg | | 38058747 | File:Interieur,_kolom_met_schildering_-_Doesburg_-_20360001_-_RCE.jpg | | 38058761 | File:Interieur,_koor,_5e_vak,_gewelfschildering_-_'t_Zandt_-_20374258_-_RCE.jpg | | 38058788 | File:Interieur,_koor,_detail_van_de_gewelfschildering_in_de_apsis_tijdens_restauratie_-_Westergeest_-_20332997_-_RCE.jpg | | 38058799 | File:Interieur,_koor,_gebrandschilderd_glas,_Karel_V,_detail_-_'s-Gravenhage_-_20365072_-_RCE.jpg | | 38058818 | File:Interieur,_koor,_gewelfschildering,_travee_2,_plantmotief_geschilderd_over_voorganger_-_Zaltbommel_-_20360932_-_RCE.jpg | | 38058844 | File:Interieur,_koor,_noordelijke_straalkapel_met_beschilderde_bogen_-_Roermond_-_20365712_-_RCE.jpg | | 38058852 | File:Interieur,_koor,_overzicht_hoofdaltaar_-_Steenbergen_-_20321078_-_RCE.jpg | | 38058882 | File:Interieur,_koor_naar_het_oosten_-_Waalwijk_-_20342658_-_RCE.jpg | | 38059146 | File:Interieur,_kruisbeeld_-_Woerden_-_20378932_-_RCE.jpg | | 38059171 | File:Interieur,_kruiswegstatie_9-_Jezus_valt_voor_de_derde_maal_onder_het_kruis_-_Emmen_-_20531880_-_RCE.jpg | | 38059250 | File:Interieur,_leeszaal_in_de_nieuwbouw_-_Middelburg_-_20374628_-_RCE.jpg | | 38058623 | File:Lëtzebuerger_Guiden_a_Scouten,_Stolpersteng_Déifferdeng,_11,_rue_Saint-Nicolas-001.jpg | | 38058046 | File:Novi_Sad,_Jaše_Tomića.jpg | | 38058075 | File:Novi_Sad,_Petrovaradin,_rekonstruovaná_pevnost.jpg | | 38058084 | File:Novi_Sad,_Poljoprivredni_sajam,_traktor_před_budovou_veletrhu.jpg | | 38058495 | File:Novo_naselje01.jpg | | 38058658 | File:Novokuznetsk_Перекрёсток_пр._Металлургов_-_ул._Орджоникидзе_(панорама_на_180°).jpg | | 38058661 | File:Novokuznetsk_Южкузбассуголь_001.JPG | | 38058751 | File:Novos_usuariospt.jpg | | 38058867 | File:Novosibirskaya-oblast'.jpg | | 38059086 | File:NovyKnin-2008-05-10-JizniStranaNamesti.JPG | | 38059132 | File:NovyTeleckov.jpg | | 38059138 | File:Novy_Hrad_(Jimlin)_1Nadvori.JPG | | 38059142 | File:Novy_Hrad_(Jimlin)_4.JPG | | 38059148 | File:Novy_Kostel_CH_CZ.png | | 38059160 | File:Novy_most_ze_stareho_Melnik.jpg | | 38059342 | File:Nová_ves_-_vodárna,_autobusová_zastávka_Pepsi.JPG | | 38059347 | File:Nová_Žiarska_Chata.jpg | | 38059351 | File:Nové-Bránice-zvonice2013b.jpg | | 38059375 | File:Nové_Dvory_(Sedlec-Prčice),_křižovatka_u_kapličky,_shora.jpg | | 38059376 | File:Nové_Dvory_(Sedlec-Prčice),_křižovatka_u_kapličky,_zdola.jpg | | 38058091 | File:Past_Wills,_Leo_e_Diva1.jpg | | 38058081 | File:PikiWiki_Israel_41226_Plants_of_Israel.JPG | | 38058476 | File:Puzze_Magnetismo.png | | 38058684 | File:Roberto_Traversini,_Vernissage_Judenrein_Differdange-001.jpg | | 38058775 | File:Ryde_Tesco_pedestrian_walkway.JPG | | 38058474 | File:Swearingen_SA-227AT_Merlin_IV_C_Private_N577MX,_LUX_Luxembourg_(Findel),_Luxembourg_PP1317232892.jpg | | 38058431 | File:X-ray_of_abdomen_with_perforated_IUD.jpg | | 38058275 | File:Yellowstone_Roads_and_Bridges,_Lake,_Teton_County,_WY_HAER_WYO,20-YELNAP,9-15.tif | | 38058315 | File:Yellowstone_Roads_and_Bridges,_Lake,_Teton_County,_WY_HAER_WYO,20-YELNAP,9-36.tif | | 38058283 | File:Yellowstone_Roads_and_Bridges,_Lake,_Teton_County,_WY_HAER_WYO,20-YELNAP,9-76.tif | | 38058201 | File:Հրանտ_Թադևոսյանի_աշխատանքների_ցուցահանդեսը_ՀՆՄ-ում_(2).jpg | 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