cart all messed up

[Guest]

I woke up this morning and my cart was all messed up, headers in admin were numbers and digits, and I had a warning on the front page of my cart that my permissions were open, I fixed that and the giberish in the headers however, I still get the following error when I try to purchase something from my cart.

 

Error!

Unable to determine the page link!

 

I went to one of our clients carts and they had the same open permissions warning on their page, this happened over night, everything was fine yesterday afternoon. I didnt do any updates or changes yesterday to any of our sites. Have we been hacked? Here is the site address, http://www.mytinydog.com/catalog

if you would like to see the errors and when they happen. I copied the error log for yesterday "pasted below" Thanks for the help.

 

[06-Dec-2004 14:04:42] PHP Warning: session_start(): open(/tmp/sess_e0dca34b0c4612a4e4872e923a80c72e, O_RDWR) failed: Permission denied (13) in /home/tamolly/public_html/catalog/includes/functions/sessions.php on line 67

[06-Dec-2004 14:04:42] PHP Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/tamolly/public_html/catalog/includes/functions/sessions.php:67) in /home/tamolly/public_html/catalog/includes/functions/sessions.php on line 67

[06-Dec-2004 14:04:42] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/tamolly/public_html/catalog/includes/functions/sessions.php:67) in /home/tamolly/public_html/catalog/includes/functions/general.php on line 29

[06-Dec-2004 14:04:42] PHP Warning: session_write_close(): open(/tmp/sess_e0dca34b0c4612a4e4872e923a80c72e, O_RDWR) failed: Permission denied (13) in /home/tamolly/public_html/catalog/includes/functions/sessions.php on line 106

[06-Dec-2004 14:04:42] PHP Warning: session_write_close(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in /home/tamolly/public_html/catalog/includes/functions/sessions.php on line 106

[07-Dec-2004 20:46:08] PHP Warning: mysql_connect(): Can't connect to local MySQL server through socket '/var/tmp/mysql.sock' (2) in /home/tamolly/public_html/catalog/includes/functions/database.php on line 19

[07-Dec-2004 20:46:15] PHP Warning: mysql_connect(): Can't connect to local MySQL server through socket '/var/tmp/mysql.sock' (2) in /home/tamolly/public_html/catalog/includes/functions/database.php on line 19

[07-Dec-2004 20:49:18] PHP Warning: mysql_connect(): Can't connect to local MySQL server through socket '/var/tmp/mysql.sock' (2) in /home/tamolly/public_html/catalog/includes/functions/database.php on line 19

[07-Dec-2004 20:49:24] PHP Warning: mysql_connect(): Can't connect to local MySQL server through socket '/var/tmp/mysql.sock' (2) in /home/tamolly/public_html/catalog/includes/functions/database.php on line 19

 

I tried changing the tmp permissions to 777, I still get an error when adding an item to my cart,

 

"Error!

Unable to determine the page link!"