Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/service/ForumService.java
===================================================================
diff -u -r74986471ac5c3104688c25474b13d85d512a4b39 -ra75be14588cea0e83534434af882b06031998ccb
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/service/ForumService.java	(.../ForumService.java)	(revision 74986471ac5c3104688c25474b13d85d512a4b39)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/service/ForumService.java	(.../ForumService.java)	(revision a75be14588cea0e83534434af882b06031998ccb)
@@ -514,7 +514,7 @@
 		report.setDateMarksReleased(new Date());
 		if (notifyLearnersOnMarkRelease) {
 		    ForumUser user = msg.getCreatedBy();
-		    StringBuilder notificationMessage = notificationMessages.get(user.getUserId());
+		    StringBuilder notificationMessage = notificationMessages.get(user.getUserId().intValue());
 		    if (notificationMessage == null) {
 			notificationMessage = new StringBuilder();
 		    }