MySQL broken in 4.0.5RC6

I know this belongs in the developers list..but for some reason, it's not allowing me to subscribwe, so I'm posting it here. When I upgrade to 4.0.5rc6, i get the following error: Warning: MySQL Connection Failed: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111) in /home/sites/site1/web/intranet/main.php on line 309 When I reinstall 4.0.4pl1, all works perfectly. I'm using RH Linux 6.2, Mysql 3.23.36 from RPMs on mysql.com. Here is my configure line I used for both 4.0.4pl1 and 4.0.5rc6 ./configure --with-mysql --with-imap=/usr/lib --enable-trans-sid --with-apxs =/usr/sbin/apxs Here is the code it chokes on when using RC6, but not 4.0.4pl1 303 - function pull_emp_db($username,$password) 304 { 305 $user = "***"; //username needed to access db 306 $pass = "****"; //password needed to access db 307 $db_server = "localhost"; //the mysql db server 308 $db = "lrefined"; //Name of the database where information is stored 309 $db_connect = mysql_connect("$db_server", "$user", "$pass"); 310 if (! $db_connect) etc.....