Phone meeting with the makers of a program the company uses regularly:

Me: "so I believe you received the list of problems we have run into recently, can you walk us through how to make the changes necessary to fix them?"

them: "we see none of these errors"

me: "that's impossible, we had all of them yesterday, they crashed a few servers"

*checks version number on program, it's different*

me: "hold on one second"

*checks computer log, they were logged in this morning before I came in*

I figured out they received the list, fixed it, and then turned to us and said we didn't know what we were talking about because none of the errors were there, because they wanted to look superior.

Fuck those guys.