Working on a 1.1.12 forum which has been unuseable due to session verification errors. Admin cannot access admin section, members can't post or pm, registration keeps looping back to registration form. Tinkering around in the database, I see that the forum is generating around 50-60 errors per minute while in maintenance mode. This is what they look like in smf_log_errors:
2: Unknown: open(/var/chroot/home/content/p/r/o/accountname/tmp/sess_e344e3bc9382eb3333865ad52aa757b1, O_RDWR) failed: No such file or directory (2)<br />File: Unknown
2: session_start() [<a href='function.session-start'>function.session-start</a>]: open(/var/chroot/home/content/p/r/o/accountname/tmp/sess_00086525fdcc8faf7fcb452c65c5ca05, O_RDWR) failed: No such file or directory (2)<br />/home/content/p/r/o/accountname/html/forums/Sources/Load.php<br />1957
2: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct ()<br />File: Unknown
