You seem to have the same problem as me. I started another thread from which you will see that after a bit of investigation I found that RW7 was republishing all the theme files, whereas RW6 did not. Read down my thread as my second post describes the problem. This is, I believe, what accounts for the massive increase in files. http://forums.realmacsoftware.com/t/rw-7-0-1-slow-publishing/7424?u=kilburnlad