Just yesterday I went to develop 4 LF negs (4x5) in my Jobo setup...
Poured in the soak, let it run for 5 minutes, then poured in the developer. Heck, the color doesn't seem right! (Rodinal is supposed to be yellowish...). S**t!!! I forgot to add Rodinal into the water when preparing the developer!
I just left the drum rolling with water sloshing inside while I quickly prepared another batch, this time making sure that I actually add the 5.5 ml of Rodinal...
Whew! Everything turned out fine (more or less). It just had a kind of looooong pre-wash stage (about 15 minutes).

Denis