I think it has something to do with the plugin called The Holy Scripturizer. I've been going between that and eBibliscious (sp?). Neither one of them are perfect.
I've got the Heidelberg Catechism on a page and use the plugin to show the Scripture when mousing over it. The Scripturizer probably couldn't handle all the Scripture references but I don't know why that would slow the whole site down to a crawl. I'll have to figure something else out because this catechism thing is pretty neat.