When Belt teleported me into the thieves corporation, the game crashed to desktop in some seconds. I managed to take a screenshot where you can see there is an 'invisible' thief - there is only a blue circle.
the problem was solved by uninstalling aurora.
Here's my WEIDU file (the recently uninstalled files were removed after the first crash occurred, in order to solve the problem):
// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
~SETUP-VALEN.TP2~ #5 #0 // Valen
~SETUP-VALEN.TP2~ #5 #10 // Give More Creatures Protection From Level Drain & Undead
~SETUP-TASHIA.TP2~ #4 #0 // Tashia NPC Add-on Mod BG2:SoA/ToB v.2.05
~SETUP-FADE.TP2~ #0 #0 // Fade: An NPC for Baldur's Gate II
~NINDE/NINDE.TP2~ #0 #0 // Ninde NPC Mod for BGII: SoA: v1.1
~SETUP-BGT.TP2~ #5 #0 // Baldur's Gate Trilogy - Principale: 1.08 (26 Nov 09)
~SETUP-BGTMUSIC.TP2~ #4 #1 // Baldur's Gate Trilogy - Musica -> Musica Ibrida Baldur's Gate/Shadows of Amn/Throne of Bhaal
~SETUP-BP-BGT-WORLDMAP.TP2~ #2 #0 // Mappa per Baldur's Gate v7.1 ? include le icone colorate della mappa di Baldur's Gate -> Nuova Mappa da usare con la Mega Modifica...: v7.1
~SETUP-BP-BGT-WORLDMAP.TP2~ #2 #2 // Mappa per Throne of Bhaal -> Usa la nuova mappa anche per Throne of Bhaal: v7.1
~SETUP-JPS_PORTRAITS.TP2~ #0 #0 // Alternate Aerie Portrait by JPS
~SETUP-JPS_PORTRAITS.TP2~ #0 #1 // Alternate Imoen Portrait by JPS
~ITEM_REV/ITEM_REV.TP2~ #0 #12 // Items of Protection Can Be Worn with Magical Armor: v2
~SETUP-SOS.TP2~ #4 #0 // Shadows Over Soubar: 1.13
~SETUP-SOS.TP2~ #4 #1 // Remorhaz walking speed adjustment (for ENGLISH version .EXE ONLY!!!): 1.13
~SETUP-DSOTSC.TP2~ #3 #0 // DSotSC per BGT-Weidu: v215
~SETUP-DSOTSC.TP2~ #3 #100 // Dark Side Interparty Banter: v215
~SETUP-DSOTSC.TP2~ #3 #200 // Extended NPC Soundsets -> Additions only: v215
~SETUP-DSOTSC.TP2~ #3 #430 // Alternate CuChoinneach Portrait: v215
~SETUP-NTOTSC.TP2~ #4 #0 // NTotSC per BGT-Weidu: v1.70a
~SETUP-NTOTSCV171.TP2~ #2 #0 // Fix NTotSC Issues: v1.71
~SETUP-BGTTWEAK.TP2~ #4 #100 // Eldoth ricorda il riscatto per Skie: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #400 // Aggiungi il Mantello di Semaj e l'Anello di Protezione Potenziato di Koveras: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #500 // Locazioni principali gi? esplorate quando visitate per la prima volta: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #600 // Orsi sensibili ai Druidi/Ranger in BG1: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #800 // Importa pi? oggetti in Shadows of Amn (ATTENZIONE: Questo pu? essere considerato un trucco): 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #902 // Attivazione casuale delle trappole nella caverna dei pirati -> Attivazione casuale a livello di gioco: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1000 // Borse della Costa della Spada: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1101 // Spawns alternativi -> Spawns bilanciati in stile TuTu: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1200 // Arkion reagisce alla reputazione del giocatore: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1300 // Coran risponde alla morte di una viverna: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1400 // Piu scalpi di banditi: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1800 // Importa altri NPCs in Shadow of Amn: Alora: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1801 // Importa altri NPCs in Shadow of Amn: Branwen: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1803 // Importa altri NPCs in Shadow of Amn: Kagain: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1804 // Importa altri NPCs in Shadow of Amn: Kivan: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1805 // Importa altri NPCs in Shadow of Amn: Sharteel: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1807 // Importa altri NPCs in Shadow of Amn: Xan: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1809 // Importa altri NPCs in Shadow of Amn: Bub Snikt: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1810 // Importa altri NPCs in Shadow of Amn: Conchobhair Strongblade: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1811 // Importa altri NPCs in Shadow of Amn: Ferthgil Trollslayer: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1812 // Importa altri NPCs in Shadow of Amn: Jet'laya: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1813 // Importa altri NPCs in Shadow of Amn: Keiria Silverstring: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1814 // Importa altri NPCs in Shadow of Amn: Skeezer Lumpkin VI: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #1815 // Importa altri NPCs in Shadow of Amn: Will Scarlet O'Hara: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2002 // Modifiche alla biografia del protagonista -> Assegna la biografia di BG2 quando si passa a Shadows of Amn: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2100 // Armi esotiche per Taerom: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2200 // BG1-ificazione degli oggetti: Cambio dei prezzi: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2204 // BG1-ificazione degli oggetti: Modifiche al comportamento degli oggetti: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2300 // Disabilita la reazione ostile dopo un incantesimo di fascinazione: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2400 // Gli oggetti dei nemici si frantumano: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2600 // Impedisci l'accesso alla Torre di Durlag dalle aree adiacenti: 9 (25 Nov 09)
~SETUP-BGTTWEAK.TP2~ #4 #2700 // Metti la Spada del Caos +2 nell'inventario di Sarevok: 9 (25 Nov 09)
~SETUP-GUI.TP2~ #0 #2 // Game Graphical User Interface (GUI) -> "Baldur's Gate Trilogy" (Elminster wielding staff)"
~SETUP-INDINPC.TP2~ #4 #0 // Indira NPC per BG1Tutu e BGT
~TYRISFLARE/SETUP-TYRISFLARE.TP2~ #0 #0 // Tyris Flare NPC: v2
~TYRISFLARE/SETUP-TYRISFLARE.TP2~ #0 #103 // Alternate Tyris Portraits -> Alternate Portrait 3: v2
~TB#TWEAKS/TB#TWEAKS.TP2~ #0 #100 // Nature's Beauty Tweak. (v2.10)
~TB#TWEAKS/TB#TWEAKS.TP2~ #0 #150 // Imprisonment Fix. (v2.10)
~TB#TWEAKS/TB#TWEAKS.TP2~ #0 #200 // Flesh to Stone Fix. (v2.10)
~BG1NPC.TP2~ #0 #0 // The BG1 NPC Project: Required Modifications: v16
~BG1NPC.TP2~ #0 #1 // The BG1 NPC Project: Banters, Quests, and Interjections: v16
~BG1NPC.TP2~ #0 #2 // The BG1 NPC Project: Give Edwin his BG2 portrait.: v16
~BG1NPC.TP2~ #0 #6 // The BG1 NPC Project: Give Viconia her BG2 portrait.: v16
~BG1NPC.TP2~ #0 #8 // The BG1 NPC Project: Add Non-Joinable NPC portraits to quests and dialogues: v16
~BG1NPC.TP2~ #0 #9 // The BG1 NPC Project: Ajantis Romance Core (teen content): v16
~BG1NPC.TP2~ #0 #10 // The BG1 NPC Project: Branwen's Romance Core (teen content): v16
~BG1NPC.TP2~ #0 #11 // The BG1 NPC Project: Coran's Romance Core (adult content): v16
~BG1NPC.TP2~ #0 #12 // The BG1 NPC Project: Dynaheir's Romance Core (teen content): v16
~BG1NPC.TP2~ #0 #13 // The BG1 NPC Project: Shar-Teel Relationship Core (adult content): v16
~BG1NPC.TP2~ #0 #14 // The BG1 NPC Project: Xan's Romance Core (teen content): v16
~BG1NPC.TP2~ #0 #15 // The BG1 NPC Project: Female Romance Challenges, Ajantis vs Xan vs Coran: v16
~BG1NPC.TP2~ #0 #27 // The BG1 NPC Project: Bardic Reputation Adjustment: v16
~BG1NPC.TP2~ #0 #200 // The BG1 NPC Project: Player-Initiated Dialogues: v16
~BG1NPCMUSIC/BG1NPCMUSIC.TP2~ #0 #0 // The BG1 NPC Project Music Pack -> Install All Audio: v5
~BG1NPC_PORTRAIT_PACK/BG1NPC_PORTRAIT_PACK.TP2~ #0 #0 // Copy all portraits for use by player characters: v2
~BG1NPC_PORTRAIT_PACK/BG1NPC_PORTRAIT_PACK.TP2~ #0 #10 // Alternate Dynaheir Portrait -> Alternate #3 by Amok: v2
~ITEM_REV/ITEM_REV.TP2~ #0 #7 // Heavy Armor Encumbrance -> Movement Speed Penalties in Heavy Armor: v2
~ITEM_REV/ITEM_REV.TP2~ #0 #11 // Dual Wielding Changes for Light and Heavy Weapons: v2
~ITEM_REV/ITEM_REV.TP2~ #0 #13 // Halberds Can Slash, Too: v2
~ITEM_REV/ITEM_REV.TP2~ #0 #16 // Restrict Fighter/Druids to Armor that Druids Can Wear: v2
~1PP.TP2~ #0 #0 // One Pixel Productions: v2 Everything but Potions (1): v2.7
~1PP.TP2~ #0 #7 // One Pixel Productions: v3 Legacy Shields - Bucklers (D1) (: v2.7
~1PP.TP2~ #0 #8 // One Pixel Productions: v3 Legacy Shields - Small Shields (D2) (9): v2.7
~1PP.TP2~ #0 #9 // One Pixel Productions: v3 Legacy Shields - Medium Shields (D3) (10): v2.7
~1PP_FEMALE_DWARVES/SETUP-1PP_FEMALE_DWARVES.TP2~ #0 #0 // Separate Avatars for Female Dwarves -> Separate Avatars for Female Dwarves - Baldur's Gate II
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #0 // Aurora's Shoes and Boots: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #10 // Small portraits for NPCs -> Merchants and minor NPCs: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #50 // Shorten BG2 intros -> Shorten Dungeon cutscene: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #115 // Change store buying prices -> Reduce to 75%: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #170 // Change store selling prices -> Increase by 125%: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #220 // Change gem and jewelry prices -> Reduce to 75%: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #257 // Change quest gold rewards -> Fixes only: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #410 // Realistic random treasures -> Only intelligent creatures get random scrolls: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #473 // Change creature gold carried -> Reduce to 67%: v5
// Recently Uninstalled: ~AURORA/SETUP-AURORA.TP2~ #0 #9000 // Fix area creature references: v5
~1PP.TP2~ #0 #2 // One Pixel Productions: v3 Flaming Swords (3): v2.7
~1PP.TP2~ #0 #3 // One Pixel Productions: v3 Flame Short Swords (4): v2.7
~1PP.TP2~ #0 #4 // One Pixel Productions: v3 Flame Short Swords item patches (5): v2.7
~1PP.TP2~ #0 #5 // One Pixel Productions: v3 Flame Short Swords mod item patches (6): v2.7