I know WordPress started out as a blogging app, but it's commonly used as a CMS these days. I have some users using WordPress and they're confused whenever they see a reference in the interface to "blog" when really it's referring to the entire WP install, or site.
An example of this would be Settings > Privacy:
I would like my blog to be visible to everyone, including search engines (like Google, Bing, Technorati) and archivers
That should read site or similar. Otherwise users think it refers only to the blog portion of the WP install.