Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/web/actions/ExportServlet.java
===================================================================
diff -u -r2700025047410d38f40b3bd7c56966a9fc08bb29 -r9244b34c4fb2d5f290f730e2417d70aa08caf6bb
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/web/actions/ExportServlet.java	(.../ExportServlet.java)	(revision 2700025047410d38f40b3bd7c56966a9fc08bb29)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/web/actions/ExportServlet.java	(.../ExportServlet.java)	(revision 9244b34c4fb2d5f290f730e2417d70aa08caf6bb)
@@ -207,7 +207,7 @@
 							}
 							idx++;
 						}
-						topic.setAttachmentLocalUrl(userName + "/" + idx + "/" + att.getFileName());
+						topic.setAttachmentLocalUrl(userName + "/" + idx + "/" + att.getFileUuid() + '.' + FileUtil.getFileExtension(att.getFileName()));
 						try {
 							handler = getToolContentHandler();
 							handler.saveFile(att.getFileUuid(), FileUtil.getFullPath(directoryName, topic.getAttachmentLocalUrl()));