I seem to be having an unusual problem here. Or at least I haven't had it before. My prints are coming out of processing with a dark golden yellow stains randomly placed. There are no obvious chemistry issues and when I test to make it happen intentionally, I cannot get it to happen. Then off I go to process prints and there it is again.

The only thing I can think is different than usual is that I usually expose a print and process it right then. This prints were processed last night and it was too hot to mess with them, so I set them overnight in an airconditioned room in their original black bag and box, then processed this morning. And, no, now that I think of it I didn't let the box have time to adjust to the warmer room this morning, but I thought that was relating to exposing papers and films, not processing.

What have I done? Any ideas?