I have two bottles of Dektol under my darkroom sink that I mixed September 4th, 2005. One is stock solution, the other is diluted 1:2. Both were stored in half full amber glass bottles with the airspace filled with Beseler XDL spray. I was making my first pinhole paper negatives this morning, and I decided to use the 1:2 diluted solution to see if it would develop the paper. It did. It worked. I'd never exposed paper in a camera before, so I had no idea where to start with exposure. I used a 5x7 f/560 200mm camera. First exposure was 1 minute 30 seconds, and the next one was 2 minutes 45 seconds. There isn't much density on the first paper, and the second one is a little thin, but it appears quite printable. I've just made a couple more longer exposures on the same paper, 4 minutes each. I'll develop those next, then make contact print positives and develop them in the same seven year old 1:2 developer, and report back. I haven't tried the stock solution yet. I would expect it to be in at least as good a shape as the 1:2 diluted stuff, which, by the way, was used once as second developer for some Tri-X reversal movie film. I am amazed this developer worked at all, after such a long time in a half-filled bottle. Has anyone else ever found such an old mixed working solution developer to work?