The fall issues of various fashion mags, which are traditionally scoliosis-inducing, have slimmed down quite a bit this year due to a decrease in advertising pages. "Nearly all fashion mags are down in their page count this year," reports CocoPerez (yes, that is Perez Hilton's new blog). "Lucky is down 69 pages, Harper's Bazaar is down 76, Elle lost 140 pages this year, W shaved off 216 and…