DPL (Dynamic Page List extension) has a problem with MediaWiki 1.14.0rc1. Any DPL tags that select on the Image namespace (e.g., namespace=Image) break because Image has been renamed to File.
I'm surprised this breaks DPL. I filed a bug report on the DPL web site.
Just letting people know, as this may require manual fixes to DPL tags after deployment.
DanB