Post box overflow

I just upgraded to 2.0.5 and now the post box is acting funny. I am using IE7.0 and when I load the post edit page the post box overflows behind the right side sidebar options and past the right edge of the browser window. When I resize the browser window it snaps back into place, but then when I begin typing again it overflows back under the sidebar.

You can see a screen cap of what I’m talking about here:
http://blog.wittmania.com/wp-content/uploads/2006/11/post_box.gif

Note: It works fine in Firefox, so all of you /. types can make fun of me for using IE. I know, I know… I’m a Microsoft pawn.