There are two problems with the function admin_url in Filters.php:
a) it returns a https-url even if the scheme is set to 'http'
b) it alwayls returns a https-url if the settings say 'Force SSL Administration'. This breaks frontend plugins like wp search suggest, if they are used on a ssl enabled site and the frontend page gets delivered via http.
To solve this issue i broadened the if-statement in admin_url.
Replace in Filters.php the line
if ( ( $scheme == 'https' || $this->getPlugin()->getSetting('ssl_admin') || ( ( is_admin() || $GLOBALS['pagenow'] == 'wp-login.php' ) && $this->getPlugin()->isSsl() ) ) && ( ! is_multisite() || ( is_multisite() && parse_url($url, PHP_URL_HOST) == $this->getPlugin()->getHttpsUrl()->getHost() ) ) ) {
with this line
if ( $scheme != 'http' && ( ( $scheme == 'https' || ( is_admin() && $this->getPlugin()->getSetting('ssl_admin') ) || ( ( is_admin() || $GLOBALS['pagenow'] == 'wp-login.php' ) && $this->getPlugin()->isSsl() ) ) && ( ! is_multisite() || ( is_multisite() && parse_url($url, PHP_URL_HOST) == $this->getPlugin()->getHttpsUrl()->getHost() ) ) ) ) {
With kind regards
hsz_36
