Pages and Posts showing blank after install

Hi,

After installing WPMU DEV SEO on my multisite installation 2 of the pages and also the main news (blog) page are now blank – ie full white screen. If I de-activate the plugin they immediately re-appear. The 2 pages are not set up any diffferently to the other site pages.

As this is a client site I would need to provide you with private access to the site and admin area for you to investigate if possible?

Thanks

David