Article Index even when not there breaks Cover Image Formatting

Hi SI Team

I have had some issues with page breaks recently.

Here is an e.g. of my latest problem.

http://www.finalbug.net/blog/entry/490-all-you-need-to-make-your-movie-for-free-01

This article (and others) contain no page breaks.
And yet there is since the latest EB update a space to the right of the cover image.
This space is I believe intended for a none existent Article Index.
This is obviously messing with the format of the cover image which has a width of 800 pixels.

Any ideas what is going on here?

thanks

Paul