FC5 services that will not start

[Chris Jones]

I am using FC5 on a generic Athlon x64 PC. I am having problems with 
several services.

1. Dovecot refuses to start. When I attempt to start the service I get a 
message in /var/log/messages as follows:
Jun 25 23:05:38 bilbo kernel: audit(1151273138.255:415): avc:  denied  { 
create } for  pid=1480 comm="dovecot" 
scontext=user_u:system_r:dovecot_t:s0 
tcontext=user_u:system_r:dovecot_t:s0 tclass=socket

Can anyone here give me a hint on what I need to do to get this working? 
>From the log message, this seems to be something to do with selinux.

2. On Samba, I experience a different, but possibly related problem. 
Samba starts, but I see the following message in the log every few minutes:

Jun 25 23:09:25 bilbo smbd[1502]:   Denied connection from  (192.168.0.5)
Jun 25 23:11:50 bilbo smbd[1513]: [2006/06/25 23:11:50, 0] 
lib/access.c:check_access(328)

The other PC referred to in the log message is unable to even see the 
linux share.

Any help here would be greatly appreciated.
--
Chris Jones