Media weirdness

Now that I'm taking the T, I've been reading the Metro. (Which is fairly decent, for what it is.) So, I was wondering: Did anyone else notice that they had 2 different front pages today? (Different headlines, different lead articles... not repeated in the opposite editions.) I brought one of each home for sdavido, who was equally intrigued, but I'm curious as to whether anyone might know why they did it...

Edit: The two versions were interleaved and being handed out alternately, A B A B, so I got A, the next person got B, etc. ... I noticed and stopped to watch so I could be sure I wasn't imagining things. The papers being read on the platform and train were about evenly distributed between the two versions.