I can't seem to figure out why that would happen.
In fact I added iRite to one of my pages and used your configuration .js file and .css file and I don't have that problem?!
Is there anything else you might have edited or changed? Does the problem go away when you remove the reference to soul.css in the configuration .js for iRite?
I can't figure out what you might have different than me that prevents me from having the problem when I test it.