Hello DP members, My site was indexed by google almost 368,0000+ pages & i use .htaccess for re write URL. (My URL structure is like this http://mydomain.com/cat/news/1/sample-post.html ). Now problem is, 2 days ago my all page with structure like this http://mydomain.com/cat/news/1/sample-post.html are removed from google search. so i just changed my URL structure to http://mydomain.com/category/news/1/sample-post.html (here i changed cat to category) & google start indexing same pages. so point is if i use my old URL structure then google not index my pages. can anyone know why google doing that? even i have PR 3 site with good backlinks. please suggest me same tips coz i don't want loss my new pages & my rank. Thanks