utf 8 - Strange characters appearing in wordpress -

i'm having niggling wordpress problem

whenever i'm adding apostrophe wordpress post create

'

its saving strange set of characters

’

i've used wordpress many times, never encountered problem

i've uninstalled every single plugin, , problem remains

i read somewhere comment out these lines in wp-config.php doesn't new posts

/** database charset use in creating database tables. */ //define('db_charset', 'utf8');  /** database collate type. don't change if in doubt. */ //define('db_collate', ''); 

can me? need set charset override somewhere? how??

if strange character stored in db, seems db not set utf8 charset, can uncomment 2 lines in wp-config.php, since not source of problem.

you have comprehensive tutorial how convert character sets wordpress database here short list do:

• make backup of db

• maybe better make copy of site on local computer , try below changes there

• convert db (this not affect existing tables,just future new created tables)

  alter database mydb character set utf8;

• convert tables in database not in desired format.

  focus on tables wp_posts , wp_postmeta

  alter table wp_posts character set utf8

  alter table wp_postmeta character set utf8

• individually alter each column of each table use correct character set. not simple process, read section of above link regarding columns.