Troubles after upgrade

I upgraded to the latest release (2.2.3) Had all kinds of gibberish on the screen. I deactivated plugins before upgrade, I did run update.php and I even tried going back to a default theme.

After much frustration I reloaded 2.2.1 but I still have the following coding in various areas of the Dashboard: Header area, latest Activity, under the line – need help with WordPress. The jibberish/coding is: !(\.[^.]+)?$!’, ‘.thumbnail’ . ‘$1’, basename( $file ), 1 ); $thumbpath = str_replace( basename( $file ), $thumb, $file ); // move the thumbnail to its final destination if ( $type[2] == 1 ) { if (!imagegif( $thumbnail, $thumbpath ) ) { $error = __( “Thumbnail path invalid” ); } } elseif ( $type[2] == 2 ) { if (!imagejpeg( $thumbnail, $thumbpath ) ) { $error = __( “Thumbnail path invalid” ); } } elseif ( $type[2] == 3 ) { if (!imagepng( $thumbnail, $thumbpath ) ) { $error = __( “Thumbnail path invalid” ); } } } } else { $error = __( ‘File not found’ ); } if (!empty ( $error ) ) { return $error; } else { return apply_filters( ‘wp_create_thumbnail’, $thumbpath ); } } ?> te = ‘$comment_date'”); } ?>

Any ideas would be appreciated. Thank you in advance.