Multiple DB errors (about 70 of them)

[tekstylez]

I am recieving multiple errors corospnding to the first errors listed below, the second and third errors, I have only recieved once. It seems the first error listed comes when a new user has registered. VB support wants me to uninstal all my plugins, and upoad all my original files in order to recieve support from them. Before I do that, cause I realy don't wanna have too, I figured I would post here to see if I could get some help...

Database error in vBulletin 3.6.0:

Invalid SQL:
INSERT INTO userfield
       (userid)
VALUES
       (723);

MySQL Error  : Duplicate entry '723' for key 1
Error Number : 1062
Date         : Saturday, August 26th 2006 @ 11:56:56 PM
Script       : http://www.forum.tekstylez.com/register.php?do=addmember
Referrer     : http://www.forum.tekstylez.com/register.php?do=addmember
IP Address   : 57.72.66.20
Username     : casper
Classname    : vb_database

Database error in vBulletin :

mysql_connect(): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
/home/tekstyle/public_html/forum/includes/class_core.php on line 271

MySQL Error  :
Error Number :
Date         : Saturday, August 26th 2006 @ 08:35:54 AM
Script       : http://www.forum.tekstylez.com/vbshout.php
Referrer     : http://www.forum.tekstylez.com/
IP Address   : 66.118.233.147
Username     :
Classname    : vb_database

Invalid SQL:
SELECT * FROM user WHERE userid = 104;

MySQL Error  : Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
Error Number : 2002
Date         : Saturday, August 26th 2006 @ 08:35:47 AM
Script       : http://forum.tekstylez.com/login.php?do=logout&logouthash=ffcc51cb2c39f2f94aaa3bc7877ffc28
Referrer     : http://forum.tekstylez.com/index.php
IP Address   : 86.56.13.42
Username     : spence
Classname    : vb_database

[HMBeaty]

Well, the last 2 I think mean the database is down. I had that problem ALOT when I was hosted by powweb. The first one, hopefully someone else can answer.