Google's add-comment Firefox extension fails to log me in to Blogger beta

I downloaded Google's add-comment FireFox extension. I thought it is neat to comment on a interesting web page and have the link preserved at the same time in a relevant blog post (This works more like a scrapbook, only for the web). However, first try at www.citrix.com the extension failed to log me in. I tried both my Google account and my blogger account.

As described by previous posts, I converted to Blogger beta last week. Maybe this is one of the glitches for the SSO (single sign-on) the new Blogger beta is using. Strange thing is course, none of those valid accounts work.