WordPress: text-align fix

I just finished my new template and I was ready to test how it looks, great! but…oops a problem showed up and I couldn’t find what was wrong.

When I posted my first post I tried to float an image to the left and right but nothing happend online…

After a little search I found the problem. The Media Library adds a class on the, in my case image, and does nothing inline as I expected. So add:

/* Wordpress Alignment Fix */
img.centered {
    display: block;
    margin-left: auto;
    margin-right: auto;
}
 
img.alignright {
    margin: 0 0 2px 10px;
    display: inline;
}
 
img.alignleft {
    margin: 0 10px 2px 0;
    display: inline;
}
 
.alignright {
    float: right;
    margin: 0 0 2px 10px;
}
 
.alignleft {
    float: left;
    margin: 0 10px 2px 0;
}

I was a bit dissapointed, because I think it should be somewhere in the core css files of WordPress, since these properties can be overwritten anytime. I mean it’s a standard class added to elements, so it’s always present.