In the Canada promo for episode 2, Jane says something along the lines of:  "I know something that RJ doesn't, he's killed two people within days now, he's getting desperate, a little crazy, he doesn't realize he's made a terrible mistake."

I think this is the clue that's the beginning of the list being revealed as a fake.  Jane's real list was the names shown in his notebook around midseason.  He spent the rest of season 5 subtly advertising a fake list to trap RJ.

What better way to get down to a more manageable suspect pool than by having Jane announce that the list is fake and he's narrowed his real list down to three people?

Most people on this site have decided to accept the list and perhaps I'm as delusional as the people that think Jane is RJ, but if I'm right that the list is a fake then I'd say I'm also likely to be right on my Walter Mashburn theory.

http://www.youtube.com/watch?v=nsPG_FW53Yw