My blog address is http://ladynaysay.blogspot.com and I am using Firefox 11.0. I also have this problem in Chrome 18.0.1025.151 and IE 9.

I can compose a new post, but Preview, Save, and Publish don't work. Here's what happens with I click them.

Preview: Save button changes to Saving, and a new tab opens with about:blank in the address bar. No preview is displayed. Post is not saved in drafts.

Save: Save button changes to Saving, but post is not saved in drafts.

Publish: Save button changes to Saving, but post is not saved in drafts and is not published.

Help is appreciated. Thanks!