The only page I've found that regular members can't actually edit is the Game Updates page.
The other things that tend to change are when new dragons are released. Regular members can create the new page and edit the earning rates and breeding information fairly easily, directly on the page. However, the breed information in the chart at the top of dragon pages is not so easy and I don't think that has been edited by anyone besides myself since Bane Cane apparently quit, sometime around October, I think (that information is updated via editing ...er... code). It may lag by a few days when a new dragon comes out, but it's generally up-to-date.