Posts with Links not working

When I attempt to add a post with an html link to my site (www.quik-aero.com), it does not work. At first, everything appears fine in the WYSIWYG and HTML editors, but when I click on save or publish, the browser returns to the main page and there is no new post.

When it autosaves the draft, a grey rectangle with a red outline appears in place of the “Draft Saved at …” field. The entire page (without the new post) is loaded under that (and above the related box).

If, while still editing, I remove the link, everything returns to normal when the autosave occurs. The grey rectangle with red outline disappears. “Draft Saved at …” returns. The whole page preview disappears. The related box is back in its proper position.

If I add the link back, same problem as above.

If I am sloppy and remove the text between the “a” tags but the link tag remains (i.e. there is a link with nothing to click on), the problem is still present.

I just upgraded to 2.5 in hopes of fixing this. I was experiencing this 2.3.3 before the upgrade.

Any ideas?

Chris