After an update to 3.4 a few of the blogs I administer are all rendering this error upon attempting to enter the dashboard:
Fatal error: Call to undefined method wpdb::delete() in /home/***/wp-includes/option.php on line 370
I'm not running any of the DB Cache plugins known to produce this error (so no db.php to remove), worse yet I've disabled all plug-ins (have done the php my admin disable, as well as renaming the plugins folder) and the error persists.
Interestingly all the blogs I have that got auto-updated via Dreamhost settings are experiencing this error, however I've got a test blog running the same install that I manually updated to 3.4 and is working fine.
Any other solutions to this error that aren't plugin related?