Two days ago Top Sites disappeared from Safari, than I see that iWeb dis not show pages, iPhoto did not work well, iTunes...

Thank you very much for all the support. I have finally solved reinstalling MacOSX from a Combo Update. I think ity was a corrupted driver. Now this is my system configuration (as was time ago) ATI Radeon X600 Pro: Modello Chipset: ATY,RV370 Tipo: Monitor Bus: PCI Slot: PCI-E VRAM (totale): 128 MB Fornitore: ATI (0x1002) ID dispositivo: 0x5b62 ID revisione: 0x0000 Revisione ROM: 113-xxxxx-113 Monitor: iMac: Tipo di monitor: LCD Risoluzione: 1440 x 900 Profondità: Colore 32-bit Integrato: Sì Core Image: Supportato Monitor principale: Sì Mirror: Spento Online: Sì Quartz Extreme: Supportato Monitor: Stato: Nessun monitor collegato Thank you again