I've read some topics with similar problems and I've already tried to:
- clearing browser cache and changing browsers
- reinstall wp core files.
- disabling plugins.
- editing the line in load-styles.php, to: error_reporting( E_ALL | E_STRICT );
- adding in wp-config.php the lines: define( ‘CONCATENATE_SCRIPTS’, false ); define( ‘SCRIPT_DEBUG’, true );
But nothing is working.. what else could I try?