diff --git a/src/filters/msodump.zip b/src/filters/msodump.zip
index 22a3e5cd..a1b6d9e6 100644
Binary files a/src/filters/msodump.zip and b/src/filters/msodump.zip differ
diff --git a/src/filters/ppt-dump.py b/src/filters/ppt-dump.py
index d41c5891..6109eec4 100755
--- a/src/filters/ppt-dump.py
+++ b/src/filters/ppt-dump.py
@@ -116,9 +116,13 @@ def main (args):
         usage(exname)
         return
 
-    dumper = PPTDumper(args[0], globals.params)
-    if not dumper.dump():
-        error("FAILURE\n")
+    try:
+        dumper = PPTDumper(args[0], globals.params)
+        if not dumper.dump():
+            error("ppt-dump: dump error\n")
+    except:
+        error("ppt-dump: FAILURE (bad format?)\n")
+
     if globals.params.dumpText:
         print(globals.textdump.replace("\r", "\n"))
 
diff --git a/src/filters/xlsxmltocsv.py b/src/filters/xlsxmltocsv.py
index 84b54c3b..f73fe853 100755
--- a/src/filters/xlsxmltocsv.py
+++ b/src/filters/xlsxmltocsv.py
@@ -45,4 +45,8 @@ class XlsXmlHandler(xml.sax.handler.ContentHandler):
         elif name == "worksheet":
             print("")
 
-xml.sax.parse(sys.stdin, XlsXmlHandler())
+try:
+    xml.sax.parse(sys.stdin, XlsXmlHandler())
+except:
+    sys.exit(1)
+sys.exit(0)