Twenty Ten spacing query

Please can somebody help me?

I have jetpack installed on my theme and have the ‘All in one SEO pack’ activated.

Now, I don’t know what I did, but the bottom layout of all my pages has changed. There’s now a huge gap at the bottom of the content on each page.

I added my SEO keywords, and then I performed a plug-in update. I think this update changed the layout – not sure though.

How do I reduce the size of this gap? Its the bottom of each ‘content page’ – not the very bottom of the webpage. Understand?