when i was playing UT3 without any user-made maps, it was playing fine, and now that i installed some, when i click to start the game, it says a long message that i don't have the time to read when the game begin.

like this message appear a fraction of second and then the map loads. It seem like it doesn't have any impact on the gameplay or graphics, but i just wanted to say it here, wondering what could cause this.