Inserting images and wrapping text

Unless you provide a link to a page demonstrating the problem, no one will be able to offer much in the way of assistance.

Try adding:

.aligncenter {
	display: block;
	margin-left: auto;
	margin-right: auto;
}
.alignleft {float: left;
}
.alignright {float: right;
}

to your theme’s stylesheet.