Index: data/class_extends/page_extends/admin/products/LC_Page_Admin_Products_Product_Ex.php
===================================================================
--- data/class_extends/page_extends/admin/products/LC_Page_Admin_Products_Product_Ex.php	(revision 23329)
+++ data/class_extends/page_extends/admin/products/LC_Page_Admin_Products_Product_Ex.php	(working copy)
@@ -53,4 +53,22 @@
     {
         parent::process();
     }
+    
+    /**
+     * @see LC_Page_Admin_Products_Product::lfInitFormParam()
+     */
+    public function lfInitFormParam(&$objFormParam, $arrPost) {
+        // 指定した項目から改行を取り除く
+        $names = array(
+            'main_list_comment',
+            'main_comment',
+        );
+        foreach ($names as $name) {
+            if (isset($arrPost[$name])) {
+                $arrPost[$name] = preg_replace('/\r\n?|\n/', '', $arrPost[$name]);
+            }
+        }
+        
+        parent::lfInitFormParam($objFormParam, $arrPost);
+    }
 }