Thanks for such a quick reply.
Right now I'm working on socks with splitty yarn. I tried to fix a split yarn a row below and the kfb came out. I've started these socks several times already and the yarn is horrible for frogging so I've ended up just cutting it and starting fresh. If I have to start again I think the yarn would make a very nice scarf, no increasing, just stockinette. AARRGGHHH!!!!!
Anyhow, if I could actually do a retro fit on a kfb that I missed, that would be great. What I currently am wondering is if there is a way to put one that came loose back in place. I hope that I've said what I mean. As Alice found out, saying what you mean and meaning what you say aren't the same thing.