saguaros Unfortunately i can't allow any access right now. The steps i followed:
1. extension > template
2. chose minimal style
3. click on theme magic - change colors - save as new
The new style will miss the css responsible for responsive layouts.
For the moment I've resolved by switching back to the previous style and changing colors manually (the previous css didn't solve the problem on all devices). So is not a big problem, but you should check if that happen also in other installations.
I sense the problem is about the template, it's happened before with another template (not sure wich one), back then i solved the problem changing the grid's values in theme magic editor. This time doesn't work.