If you are using the XML Google Maps wordpress plugin (version 1.14.1 by Patrick Matusz), it has not been updated for a while, and won’t work quite right with newer versions of PHP.

If you are getting the following error message twice at the top of every page in your wordpress blog:
Warning: mysql_get_server_info(): No such file or directory in … on line 10

Change line 10 from:

if ( version_compare(mysql_get_server_info(), ‘4.1.0’, ‘>=’) ) {
to:
if ( version_compare($mysqli->server_info, ‘4.1.0’, ‘>=’) ) {

And that will make things work without the error messages.