Index: branches/5.2.x/core/units/helpers/fck_helper.php
===================================================================
diff -u -N -r16513 -r16682
--- branches/5.2.x/core/units/helpers/fck_helper.php	(.../fck_helper.php)	(revision 16513)
+++ branches/5.2.x/core/units/helpers/fck_helper.php	(.../fck_helper.php)	(revision 16682)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: fck_helper.php 16513 2017-01-20 14:10:53Z alex $
+* @version	$Id: fck_helper.php 16682 2021-03-15 08:27:47Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -530,32 +530,38 @@
 	 */
 	protected function getStyles()
 	{
+		static $cache = array();
+
 		/** @var ThemeItem $theme */
 		$theme = $this->Application->recallObject('theme.current');
 		$stylesheet_file = $theme->getStylesheetFile(true);
 
-		if ( $stylesheet_file ) {
-			$stylesheet_folder_url = dirname($stylesheet_file) . '/';
+		if ( !isset($cache[$stylesheet_file]) ) {
+			if ( $stylesheet_file ) {
+				$stylesheet_folder_url = dirname($stylesheet_file) . '/';
 
-			$url_params = Array ('events[fck]' => 'OnGetsEditorStyles', 'no_pass_through' => 1, 'pass' => 'm');
+				$url_params = array('events[fck]' => 'OnGetsEditorStyles', 'no_pass_through' => 1, 'pass' => 'm');
 
-			$prefix = $this->Application->isAdmin ? '_FRONT_END_' : '';
-			$styles_css = $this->Application->HREF('index', $prefix, $url_params, 'index.php');
+				$prefix = $this->Application->isAdmin ? '_FRONT_END_' : '';
+				$styles_css = $this->Application->HREF('index', $prefix, $url_params, 'index.php');
 
-			/** @var kCurlHelper $curl_helper */
-			$curl_helper = $this->Application->recallObject('CurlHelper');
-			$curl_helper->Send($styles_css, false);
-			$styles_css = $curl_helper->getInfo(CURLINFO_REDIRECT_URL);
-			$curl_helper->CloseConnection();
-		}
-		else {
-			$stylesheet_folder_url = $this->Application->BaseURL(rtrim(EDITOR_PATH, '/'));
-			$styles_css = $stylesheet_folder_url . 'style.css';
-		}
+				/** @var kCurlHelper $curl_helper */
+				$curl_helper = $this->Application->recallObject('CurlHelper');
+				$curl_helper->Send($styles_css, false);
+				$styles_css = $curl_helper->getInfo(CURLINFO_REDIRECT_URL);
+				$curl_helper->CloseConnection();
+			}
+			else {
+				$stylesheet_folder_url = $this->Application->BaseURL(rtrim(EDITOR_PATH, '/'));
+				$styles_css = $stylesheet_folder_url . 'style.css';
+			}
 
-		$styles_js = $stylesheet_folder_url . 'styles.js';
+			$styles_js = $stylesheet_folder_url . 'styles.js';
 
-		return array($styles_css, $styles_js);
+			$cache[$stylesheet_file] = array($styles_css, $styles_js);
+		}
+
+		return $cache[$stylesheet_file];
 	}
 
 	/**