diff --git a/main/forum/forumfunction.inc.php b/main/forum/forumfunction.inc.php
index 396314ec58..05dee829fa 100644
--- a/main/forum/forumfunction.inc.php
+++ b/main/forum/forumfunction.inc.php
@@ -332,7 +332,7 @@ function show_add_forum_form($inputvalues=array()) {
 	 } 	 
 	 $forum_image=isset($inputvalues['forum_image']) ? $inputvalues['forum_image'] : '';
 	 $form->addElement('file', 'picture', ($forum_image != '' ? get_lang('UpdateImage') : get_lang('AddImage'))); 	 
-	 $form->addRule('picture', get_lang('OnlyImagesAllowed'), 'mimetype', array('image/gif', 'image/jpeg', 'image/png'));
+	 $form->addRule('picture', get_lang('OnlyImagesAllowed'), 'filetype', array ('jpg', 'jpeg', 'png', 'gif'));
 	 $form->addElement('html','</div>');
 
 	// The OK button
diff --git a/main/forum/index.php b/main/forum/index.php
index c8bdf4a39c..aeac5a63dc 100644
--- a/main/forum/index.php
+++ b/main/forum/index.php
@@ -372,7 +372,12 @@ if (isset($_GET['action']) && $_GET['action'] == 'notify' AND isset($_GET['conte
 						echo "\t\t<td width=\"50\">";	
 						if(!empty($forum['forum_image'])) {
 							$image_path = api_get_path(WEB_COURSE_PATH).api_get_course_path().'/upload/forum/images/'.$forum['forum_image'];												
+
+							/*
 							$image_size = @getimagesize($image_path);
+							*/
+							$image_size = @getimagesize(api_url_to_local_path($image_path));
+
 							$img_attributes = '';
 							if (!empty($image_size)) {
 								if ($image_size[0] > 100 || $image_size[1] > 100) {