Sorry, I wasn't sure it was the same problem, but I "solved the problem" by installing really old version. Thanks for the tip.

0.000 2015-09-23 06:02:58; Factorio 0.11.22 (Build 14011, win32) 0.000 Operating system: Windows XP Service Pack 3 0.000 Read data path: D:/Arquivos de programas/Factorio/data 0.000 Write data path: D:/Documents and Settings/Islicato/Dados de aplicativos/Factorio 0.000 Binaries path: D:/Arquivos de...

0.001 2015-05-05 17:09:58; Factorio 0.11.22 (Build 14011, win32) 0.001 Operating system: Windows XP Service Pack 3 0.001 Read data path: D:/Arquivos de programas/Factorio/data 0.001 Write data path: D:/Documents and Settings/RodrigoGB/Dados de aplicativos/Factorio 0.001 Binaries path: D:/Arquivos de...

Thanks!

What's the string for extra low graphics quality in the config file? I've tried many combinations, none works (e.g. extralow, extra_low, xlow, extra low, extra-low, etc.)