AnD,
Go to your blog (log in), then to your profile and click the "Personal Options" to see if you have it set for <b>WYSIWYG Editor (<b>W</b>hat <b>Y</b>ou <b>S</b>ee <b>I</b>s <b>W</b>hat <b>Y</b>ou <b>G</b>et) </b>or <b>HTML Editor</b>. If it's not set on HTML Editor, select that, then click the "Update Profile" bar at the bottom to see how that turns out.
That's about all I can think of to solve the problem...first, see if that works before we think of another possible solution.