Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 6999)
+++ /CKEditor/trunk/CHANGES.html	(revision 7000)
@@ -93,4 +93,5 @@
 		<li><a href="http://dev.ckeditor.com/ticket/7944">#7944</a> : Enter key should not split or create new paragraphs inside caption elements.</li>
 		<li><a href="http://dev.ckeditor.com/ticket/7639">#7639</a> : [IE9] Browser might crash when an object is selected in the document.</li>
+		<li><a href="http://dev.ckeditor.com/ticket/7847">#7847</a> : [IE8] Insert image with non-secure source in a HTTPS page breaks the dialog.</li>
 		<li>Updated the following language files:<ul>
 			<li><a href="http://dev.ckeditor.com/ticket/7834">#7834</a> : Dutch;</li>
Index: /CKEditor/trunk/_source/core/dom/element.js
===================================================================
--- /CKEditor/trunk/_source/core/dom/element.js	(revision 6999)
+++ /CKEditor/trunk/_source/core/dom/element.js	(revision 7000)
@@ -1063,4 +1063,16 @@
 				};
 			}
+			else if ( CKEDITOR.env.ie8Compat && CKEDITOR.env.secure )
+			{
+				return function( name, value )
+				{
+					// IE8 throws error when setting src attribute to non-ssl value. (#7847)
+					if ( name == 'src' && value.match( /^http:\/\// ) )
+						try { standard.apply( this, arguments ); } catch( e ){}
+					else
+						standard.apply( this, arguments );
+					return this;
+				};
+			}
 			else
 				return standard;
Index: /CKEditor/trunk/_source/core/env.js
===================================================================
--- /CKEditor/trunk/_source/core/env.js	(revision 6999)
+++ /CKEditor/trunk/_source/core/env.js	(revision 7000)
@@ -104,5 +104,14 @@
 				return domain != hostname &&
 					domain != ( '[' + hostname + ']' );	// IPv6 IP support (#5434)
-			}
+			},
+
+			/**
+			 * Indicates that page is running under an encrypted connection.
+			 * @returns {Boolean} "true" if the page has an encrypted connection.
+			 * @example
+			 * if ( CKEDITOR.env.secure )
+			 *     alert( "I'm in SSL!" );
+			 */
+			secure : location.protocol == 'https:'
 		};