Very weird errors indeed. I will try to find what is the problem with the programs.
Also, when executing your code, it shows in the center of my screen, so it works perfect!
Still, i cannot understand why i get that white think
EDIT: i got it to work, but i used 2 times the al_flip_display();
Is that ok, or it is not recommended?
Here is my code
Actually, i was thinking if the user, can specify himself the resolution using a text box, or maybe two. Is it possible?