[pmwiki-users] problem with session_write_close

[Tamara Temple]

I'm having a problem with a brand new installation of pmwiki. I've not  
encountered this before so I'm unsure why this is happening. The  
following two warnings are presented at the top of each page:

Warning: session_write_close() [function.session-write-close]: open(/ 
var/lib/php/session/sess_sh3dvs4pgiuq04vmj1tfmkqvj1, O_RDWR) failed:  
Permission denied (13) in/var/www/vhosts/mouseha.us/httpdocs/ 
pmwiki-2.2.27/pmwiki.php on line 2012

Warning: session_write_close() [function.session-write-close]: Failed  
to write session data (files). Please verify that the current setting  
of session.save_path is correct (/var/lib/php/session) in/var/www/ 
vhosts/mouseha.us/httpdocs/pmwiki-2.2.27/pmwiki.php on line 2012

There are plenty of other session files in that directory with the  
owner/group apache:apache. I don't know why it can't deal with this.

(Cross-posted between pmwiki-users and php-general.)