"Hey, about that matter from yesterday..."
"Yes, what about that?"
"We need to talk about that again! How often do you trigger that system?"
"Once."
"You sure?"
"Yes, but i can check it, if you like."
*find references*
"See, only once."
"Can it happen at a random point later one?"
"No."
"Are you sure?"
"Yes"
"Can you check it?"
"Okay."
*shows code"
"Look here, as you can see, it will not happen at other times."
"Do you have an idea why it could happen anyway?"
"Maybe that system does the action without my software telling it to do so, wasn't that specified that way?"
"Yes, but it normally does that roughly 10 seconds after you give the command the first time, so we thought maybe you could say what makes it do the action at other points maybe."
"Did you check that systems sourcecode?"
"No not yet. But did that happen with the older version?"
"No. But we didn't try."
"Did you change something between the versions?"
"Yes, the new feature."
"Could that make a change in behaviour?"
"I don't see how."
"Can you remove that feature for test?"
"We can take the old version."
"No, we need the new version, but without the feature you added."
"That IS the old version, there is no other difference!"
"Are you sure?"
"Would you like to see it in source control?"
"No, ~ okay. What do you think causes the problem?"
"I haven't had any new ideas since we talked yesterday."
"Okay. Mhhh,...okay. Lets talk again later."

YES SURE! BRING IT ON! I'M LOOKING FORWARD TO THAT! PLEASE COME BY OR CALL ME AGAIN! AND BRING THE BOSS WITH YOU, TO SHOW HOW SERIOUS THE MATTER IS! LET ME TELL HIM THE STUFF I TOLD SEVEN TIMES LAST WEEK!