diff --git a/ChangeLog b/ChangeLog
index 8715844..4b72e19 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,9 +1,13 @@
 ChangeLog for davfs2
 --------------------
 
+2009-10-10 Werner Baumann (werner.baumann@onlinehome.de)
+    * webdav.c, dav_head:
+      Ignore Last-Modified header if the value is 0.
+
 2009-08-30 Werner Baumann (werner.baumann@onlinehome.de)
-    * cache.de, update_cache_file:
-      Don't chamge file times when Last-Modified-Header
+    * cache.c, update_cache_file:
+      Don't change file times when Last-Modified-Header
       is missing.
 
 2009-08-26 Werner Baumann (werner.baumann@onlinehome.de)
diff --git a/po/cs.po b/po/cs.po
index 41ac35b..fcfc820 100644
--- a/po/cs.po
+++ b/po/cs.po
@@ -7,7 +7,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: http://savannah.nongnu.org/support/?"
 "func=additem&group=davfs2\n"
-"POT-Creation-Date: 2009-08-30 16:54+0200\n"
+"POT-Creation-Date: 2009-10-10 18:44+0200\n"
 "PO-Revision-Date: 2007-05-03 19:50+0200\n"
 "Last-Translator: Vítězslav Kotrla <vitko@post.cz>\n"
 "Language-Team:  <cs@li.org>\n"
@@ -756,65 +756,65 @@ msgstr "připojení selhalo; server nepodporuje WebDAV"
 msgid "warning: the server does not support locks"
 msgstr "varování: server nepodporuje zámky"
 
-#: src/webdav.c:1554
+#: src/webdav.c:1557
 msgid "authentication failure:"
 msgstr "selhání autentizace:"
 
-#: src/webdav.c:1592
+#: src/webdav.c:1595
 #, c-format
 msgid "%i can't open cache file"
 msgstr "%i nemůže otevřít soubor vyrovnávací paměti"
 
-#: src/webdav.c:1600
+#: src/webdav.c:1603
 #, c-format
 msgid "%i error writing to cache file"
 msgstr "%i chyba při zápisu do souboru vyrovnávací paměti"
 
-#: src/webdav.c:1910 src/webdav.c:1913
+#: src/webdav.c:1913 src/webdav.c:1916
 msgid "error processing server certificate"
 msgstr "chyba při zpracování certifikátu serveru"
 
-#: src/webdav.c:1920 src/webdav.c:1956
+#: src/webdav.c:1923 src/webdav.c:1959
 msgid "the server certificate is not yet valid"
 msgstr "certifikát serveru zatím není platný"
 
-#: src/webdav.c:1922 src/webdav.c:1959
+#: src/webdav.c:1925 src/webdav.c:1962
 msgid "the server certificate has expired"
 msgstr "platnost certifikátu serveru vypršela"
 
-#: src/webdav.c:1924 src/webdav.c:1962
+#: src/webdav.c:1927 src/webdav.c:1965
 msgid "the server certificate does not match the server name"
 msgstr "certifikát serveru nedopovídá jménu serveru"
 
-#: src/webdav.c:1926 src/webdav.c:1965
+#: src/webdav.c:1929 src/webdav.c:1968
 msgid "the server certificate is not trusted"
 msgstr "certifikát serveru je nedůvěryhodný"
 
-#: src/webdav.c:1928 src/webdav.c:1968
+#: src/webdav.c:1931 src/webdav.c:1971
 msgid "unknown certificate error"
 msgstr "neznámá chyba certifikátu"
 
-#: src/webdav.c:1929
+#: src/webdav.c:1932
 #, c-format
 msgid "  issuer:      %s"
 msgstr "  vydavatel:      %s"
 
-#: src/webdav.c:1931
+#: src/webdav.c:1934
 #, c-format
 msgid "  subject:     %s"
 msgstr "  subjekt:     %s"
 
-#: src/webdav.c:1933
+#: src/webdav.c:1936
 #, c-format
 msgid "  identity:    %s"
 msgstr "  identita:    %s"
 
-#: src/webdav.c:1935
+#: src/webdav.c:1938
 #, c-format
 msgid "  fingerprint: %s"
 msgstr "  otisk: %s"
 
-#: src/webdav.c:1938
+#: src/webdav.c:1941
 #, c-format
 msgid ""
 "You only should accept this certificate, if you can\n"
@@ -825,27 +825,27 @@ msgstr ""
 "ověřit jeho otisk! Server může být podvržen nebo může\n"
 "dojít k útoku s prostředníkem (man-in-the-middle attack).\n"
 
-#: src/webdav.c:1941
+#: src/webdav.c:1944
 #, c-format
 msgid "Accept certificate for this session? [y,N] "
 msgstr "Přijmout certifikát pro toto sezení? [y,N] "
 
-#: src/webdav.c:1969
+#: src/webdav.c:1972
 #, c-format
 msgid "  issuer: %s"
 msgstr "  vydavatel: %s"
 
-#: src/webdav.c:1970
+#: src/webdav.c:1973
 #, c-format
 msgid "  subject: %s"
 msgstr "  subjekt: %s"
 
-#: src/webdav.c:1971
+#: src/webdav.c:1974
 #, c-format
 msgid "  identity: %s"
 msgstr "  identita: %s"
 
-#: src/webdav.c:1974
+#: src/webdav.c:1977
 msgid "  accepted by user"
 msgstr "  přijat uživatelem"
 
diff --git a/po/davfs2.pot b/po/davfs2.pot
index 1fc1dcb..50fd1d0 100644
--- a/po/davfs2.pot
+++ b/po/davfs2.pot
@@ -9,7 +9,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: http://savannah.nongnu.org/support/?"
 "func=additem&group=davfs2\n"
-"POT-Creation-Date: 2009-08-30 16:54+0200\n"
+"POT-Creation-Date: 2009-10-10 18:44+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -677,65 +677,65 @@ msgstr ""
 msgid "warning: the server does not support locks"
 msgstr ""
 
-#: src/webdav.c:1554
+#: src/webdav.c:1557
 msgid "authentication failure:"
 msgstr ""
 
-#: src/webdav.c:1592
+#: src/webdav.c:1595
 #, c-format
 msgid "%i can't open cache file"
 msgstr ""
 
-#: src/webdav.c:1600
+#: src/webdav.c:1603
 #, c-format
 msgid "%i error writing to cache file"
 msgstr ""
 
-#: src/webdav.c:1910 src/webdav.c:1913
+#: src/webdav.c:1913 src/webdav.c:1916
 msgid "error processing server certificate"
 msgstr ""
 
-#: src/webdav.c:1920 src/webdav.c:1956
+#: src/webdav.c:1923 src/webdav.c:1959
 msgid "the server certificate is not yet valid"
 msgstr ""
 
-#: src/webdav.c:1922 src/webdav.c:1959
+#: src/webdav.c:1925 src/webdav.c:1962
 msgid "the server certificate has expired"
 msgstr ""
 
-#: src/webdav.c:1924 src/webdav.c:1962
+#: src/webdav.c:1927 src/webdav.c:1965
 msgid "the server certificate does not match the server name"
 msgstr ""
 
-#: src/webdav.c:1926 src/webdav.c:1965
+#: src/webdav.c:1929 src/webdav.c:1968
 msgid "the server certificate is not trusted"
 msgstr ""
 
-#: src/webdav.c:1928 src/webdav.c:1968
+#: src/webdav.c:1931 src/webdav.c:1971
 msgid "unknown certificate error"
 msgstr ""
 
-#: src/webdav.c:1929
+#: src/webdav.c:1932
 #, c-format
 msgid "  issuer:      %s"
 msgstr ""
 
-#: src/webdav.c:1931
+#: src/webdav.c:1934
 #, c-format
 msgid "  subject:     %s"
 msgstr ""
 
-#: src/webdav.c:1933
+#: src/webdav.c:1936
 #, c-format
 msgid "  identity:    %s"
 msgstr ""
 
-#: src/webdav.c:1935
+#: src/webdav.c:1938
 #, c-format
 msgid "  fingerprint: %s"
 msgstr ""
 
-#: src/webdav.c:1938
+#: src/webdav.c:1941
 #, c-format
 msgid ""
 "You only should accept this certificate, if you can\n"
@@ -743,26 +743,26 @@ msgid ""
 "or there might be a man-in-the-middle-attack.\n"
 msgstr ""
 
-#: src/webdav.c:1941
+#: src/webdav.c:1944
 #, c-format
 msgid "Accept certificate for this session? [y,N] "
 msgstr ""
 
-#: src/webdav.c:1969
+#: src/webdav.c:1972
 #, c-format
 msgid "  issuer: %s"
 msgstr ""
 
-#: src/webdav.c:1970
+#: src/webdav.c:1973
 #, c-format
 msgid "  subject: %s"
 msgstr ""
 
-#: src/webdav.c:1971
+#: src/webdav.c:1974
 #, c-format
 msgid "  identity: %s"
 msgstr ""
 
-#: src/webdav.c:1974
+#: src/webdav.c:1977
 msgid "  accepted by user"
 msgstr ""
diff --git a/po/de.po b/po/de.po
index 7ddaed8..5675d76 100644
--- a/po/de.po
+++ b/po/de.po
@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: davfs2 1.3.3\n"
 "Report-Msgid-Bugs-To: http://savannah.nongnu.org/support/?"
 "func=additem&group=davfs2\n"
-"POT-Creation-Date: 2009-08-30 16:54+0200\n"
+"POT-Creation-Date: 2009-10-10 18:44+0200\n"
 "PO-Revision-Date: 2009-01-02 12:26+0100\n"
 "Last-Translator: Werner Baumann <werner.baumann@onlinehome.de>\n"
 "Language-Team: \n"
@@ -763,65 +763,65 @@ msgstr "das Einhängen schlug fehl; der Server unterstützt WebDAV nicht"
 msgid "warning: the server does not support locks"
 msgstr "Warnung: der Server kann Dateien nicht sperren"
 
-#: src/webdav.c:1554
+#: src/webdav.c:1557
 msgid "authentication failure:"
 msgstr "Authentifizierungsfehler"
 
-#: src/webdav.c:1592
+#: src/webdav.c:1595
 #, c-format
 msgid "%i can't open cache file"
 msgstr "%i kann die Cache-Datei nicht öffnen"
 
-#: src/webdav.c:1600
+#: src/webdav.c:1603
 #, c-format
 msgid "%i error writing to cache file"
 msgstr "%i Fehler beim Schreiben der Cache-Datei"
 
-#: src/webdav.c:1910 src/webdav.c:1913
+#: src/webdav.c:1913 src/webdav.c:1916
 msgid "error processing server certificate"
 msgstr "Fehler beim Analysieren des Server-Zertifikats"
 
-#: src/webdav.c:1920 src/webdav.c:1956
+#: src/webdav.c:1923 src/webdav.c:1959
 msgid "the server certificate is not yet valid"
 msgstr "das Server-Zertifikat ist noch nicht gültig"
 
-#: src/webdav.c:1922 src/webdav.c:1959
+#: src/webdav.c:1925 src/webdav.c:1962
 msgid "the server certificate has expired"
 msgstr "das Server-Zertifikat ist nicht mehr gültig"
 
-#: src/webdav.c:1924 src/webdav.c:1962
+#: src/webdav.c:1927 src/webdav.c:1965
 msgid "the server certificate does not match the server name"
 msgstr "das Server-Zertifikat passt nicht zum Namen des Servers"
 
-#: src/webdav.c:1926 src/webdav.c:1965
+#: src/webdav.c:1929 src/webdav.c:1968
 msgid "the server certificate is not trusted"
 msgstr "wir trauen dem Zertifikat nicht"
 
-#: src/webdav.c:1928 src/webdav.c:1968
+#: src/webdav.c:1931 src/webdav.c:1971
 msgid "unknown certificate error"
 msgstr "Fehler beim Analysieren des Server-Zertifikats"
 
-#: src/webdav.c:1929
+#: src/webdav.c:1932
 #, c-format
 msgid "  issuer:      %s"
 msgstr "  Aussteller:    %s"
 
-#: src/webdav.c:1931
+#: src/webdav.c:1934
 #, c-format
 msgid "  subject:     %s"
 msgstr "  Inhaber:       %s"
 
-#: src/webdav.c:1933
+#: src/webdav.c:1936
 #, c-format
 msgid "  identity:    %s"
 msgstr "  Name:          %s"
 
-#: src/webdav.c:1935
+#: src/webdav.c:1938
 #, c-format
 msgid "  fingerprint: %s"
 msgstr "  Fingerabdruck: %s"
 
-#: src/webdav.c:1938
+#: src/webdav.c:1941
 #, c-format
 msgid ""
 "You only should accept this certificate, if you can\n"
@@ -832,26 +832,26 @@ msgstr ""
 "dass der Fingerabdruck stimmt. Der Server könnte gefälscht sein oder\n"
 "ein Angreifer könnte sich in die Verbindung zum Server eingeschaltet haben.\n"
 
-#: src/webdav.c:1941
+#: src/webdav.c:1944
 #, c-format
 msgid "Accept certificate for this session? [y,N] "
 msgstr "Ich akzeptiere das Zertifikat für diese Sitzung [j,N]: "
 
-#: src/webdav.c:1969
+#: src/webdav.c:1972
 #, c-format
 msgid "  issuer: %s"
 msgstr "  Aussteller des Zertifikats: %s"
 
-#: src/webdav.c:1970
+#: src/webdav.c:1973
 #, c-format
 msgid "  subject: %s"
 msgstr "  Inhaber des Zertifikats: %s"
 
-#: src/webdav.c:1971
+#: src/webdav.c:1974
 #, c-format
 msgid "  identity: %s"
 msgstr "  Name: %s"
 
-#: src/webdav.c:1974
+#: src/webdav.c:1977
 msgid "  accepted by user"
 msgstr "  durch den Benutzer akzeptiert"
diff --git a/src/webdav.c b/src/webdav.c
index 09fa11d..b49eeea 100644
--- a/src/webdav.c
+++ b/src/webdav.c
@@ -769,8 +769,11 @@ dav_head(const char *path, char **etag, time_t *mtime, off_t *length,
     }
 
     value = ne_get_response_header(req, "Last-Modified");
-    if (!ret && mtime && value)
-        *mtime = ne_httpdate_parse(value);
+    if (!ret && mtime && value) {
+        time_t lm = ne_httpdate_parse(value);
+        if (lm)
+            *mtime = lm;
+    }
 
     value = ne_get_response_header(req, "Content-Length");
     if (!ret && length && value)