Description of problem:
Not sure if it's related to this particular issue; but I have dovecot configured to get user information from LDAP and use Kerberos for authentication.
SELinux is preventing /usr/libexec/dovecot/auth from 'read' accesses on the file /etc/selinux/targeted/contexts/files/file_contexts.

*****  Plugin catchall (100. confidence) suggests  ***************************

If you believe that auth should be allowed read access on the file_contexts file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep auth /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:dovecot_auth_t:s0
Target Context                unconfined_u:object_r:file_context_t:s0
Target Objects                /etc/selinux/targeted/contexts/files/file_contexts
                              [ file ]
Source                        auth
Source Path                   /usr/libexec/dovecot/auth
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           dovecot-2.1.15-1.fc18.x86_64
Target RPM Packages           selinux-policy-targeted-3.11.1-87.fc18.noarch
Policy RPM                    selinux-policy-3.11.1-87.fc18.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 3.8.6-203.fc18.x86_64 #1 SMP Tue
                              Apr 9 19:33:01 UTC 2013 x86_64 x86_64
Alert Count                   1
First Seen                    2013-04-14 15:06:29 EDT
Last Seen                     2013-04-14 15:06:29 EDT
Local ID                      a0906172-736b-475f-9179-a7146cf049fc

Raw Audit Messages
type=AVC msg=audit(1365966389.155:659): avc:  denied  { read } for  pid=8505 comm="auth" name="file_contexts" dev="sda4" ino=2885702 scontext=system_u:system_r:dovecot_auth_t:s0 tcontext=unconfined_u:object_r:file_context_t:s0 tclass=file


type=AVC msg=audit(1365966389.155:659): avc:  denied  { open } for  pid=8505 comm="auth" path="/etc/selinux/targeted/contexts/files/file_contexts" dev="sda4" ino=2885702 scontext=system_u:system_r:dovecot_auth_t:s0 tcontext=unconfined_u:object_r:file_context_t:s0 tclass=file


type=SYSCALL msg=audit(1365966389.155:659): arch=x86_64 syscall=open success=yes exit=EXDEV a0=8eb310 a1=0 a2=1b6 a3=238 items=0 ppid=934 pid=8505 auid=4294967295 uid=97 gid=97 euid=97 suid=97 fsuid=97 egid=97 sgid=97 fsgid=97 ses=4294967295 tty=(none) comm=auth exe=/usr/libexec/dovecot/auth subj=system_u:system_r:dovecot_auth_t:s0 key=(null)

Hash: auth,dovecot_auth_t,file_context_t,file,read

audit2allow

#============= dovecot_auth_t ==============
allow dovecot_auth_t file_context_t:file { read open };

audit2allow -R
require {
	type dovecot_auth_t;
}

#============= dovecot_auth_t ==============
seutil_read_file_contexts(dovecot_auth_t)


Additional info:
hashmarkername: setroubleshoot
kernel:         3.8.6-203.fc18.x86_64
type:           libreport