wp-admin/post-new.php

I upgraded WordPress to version 2.3 a few days ago and this morning I went to make my first new post since the upgrade. First of all, when I upload an image, and then click on “Insert/edit image” to fill in the “Image description” and set the “Alignment” in the “Visual” editor, the photo disappears and in its place there are two dots (..). Hoping someone might be able to help.