Henrik,
Just to echo what Geert & qwerty have said, but to add that it turns out that you as a user can't do very much about the errors. They have to be repaired by EA. Like qwerty, I'm annoyed that the item involved isn't documented, but that's only for informational purposes.
Finally, when the repository is in a non-integral state, "All bets are off". NOTHING is guaranteed to work correctly until the repository is repaired.
Once you've done your first repair, get into the habit of running the project integrity check often. Personally, I may do it a few times a day.
HTH,
Paolo