Ah, Open Office and the paragraph. OO has a quirk, inherited from UNIX. The newline character and the paragraph character are different. OO doesn't have a very flexible way of working with them in find and replace. MS Word is much better at this. I suggest trying something like doing a wild card find and replace on ^[space][space]$, where [space] is a spacebar character, with a blank line as the replacement. Then try Autocorrect or Autoformat again. YMMV.