Still broke for me in 3.0.1.
The Google calendar is set with Sunday as the first day. My WP General Settings make Sunday the first day. My Simple Calendar settings leave the setting to default (Sunday).
The grid displays correctly, but the column headings are wrong with the first column listed as Saturday.
This is not a converted calendar (I deleted those after 3.0.1 brought them back), but rather is a NEW calendar created (under 3.0.0 but now on 3.0.1).