Here is a handy link for readers coming from Kathleen Cubley's dropped-edge-stitch article in Interweave Knit's web site, Knitting Daily. Kathleen's article covers the ground admirably, while this link takes you to a TECHknitting article about the same problem, which offers a similar, yet not identical slant on the how-to of fixing these kinds of errors.
These sorts of dropped stitches at the edge are quite terrifying looking, no?
(And the reverse is true too--if you've already read TECHknitting's article on this subject, go on over to Kathleen's article to see a different illustrated take on fixing this same error).
Good knitting--TK