nnir breaks my gnus

[Paulo J. Matos]

Hi, 

I am using gnus 5.13 with emacs 23.1.1.
I tried using nnir to search an imap folder. Ever since I did that, when
I M-g the folder, gnus reads the folder shows that there is emails but
when I enter it, it marks all emails read and doesn't show up anything
(except those marked '!'). This is seriously annoying since it's marking
a bunch of emails read and I don't even get the chance to read them.

I also have absolutely no idea of what's wrong. I wonder if this is a
known problem. If it is not, can you please tip me on how to find a
possible solution?

Cheers,
-- 
PMatos