I appologize to everyone because of the quality of those images. I extracted them from the original pdf files, so it got messy, but I thought they were readable. Apparently not.
Robert, after you sent me that email, I asked them to post the link to the original pdf files, which they did. It is easy to miss, because that page does not get refreshed automatically.
The problem with A and B was mainly because the new system somehow added a blank line to all input files. Which only mattered for A and B. And for a bunch of old problems - I was told they finally found the bug, at least something good came out of it.
Again, it was all my fault, nothing to do with the problem setter. Well if he was not a Mac person I could've used his original files...