How does the leader look? It should be solid black (virtually opaque with a brownish tinge). If it wasn't max black, I would be pitching the developer out. I think perhaps you were bitten by the same bug that I was, namely, the over zealous mixing process.
You can also do a snip test: put a piece of film (leader) exposed to daylight in 50ml of stock developer and wait 6-7 minutes. You should be able to see it start to turn black in about 2-3 minutes and then proceed to opaque in 8-9 minutes. My dodgy developer never did turn pitch black even after 12 minutes. Good luck.
PS. If you used tap water, some water supplies contain a great deal of dissolved oxygen which will kill it also. Excess iron/minerals in your tap water will also compromise the activity of Xtol. Best to always use distilled water or DI water.
Last edited by Fred Aspen; 02-06-2013 at 04:30 PM. Click to view previous post history.