After update to 1.2.6 my game stopped loading, crashing to desktop every time.
Eventually tracked it down to two settings in the System Graphics options.
Regardless of any other settings at all, if "Scenes" is set to anything higher than LOW, it will crash on launch.
Shadows also needs to be set no higher than MEDIUM.
I'm not sure about the Shadows setting, but I had my "Scenes" setting on high in 1.2.5 and it loaded fine.
Wonder if anyone else running similar systems (32bit Vista, 4gig Ram, HD4890) have the same issues, and if these 'fixes' work for them??
Hope future updates will allow me to put the "Scenes" setting higher again, LOW is rubbish!