diff --git a/source/de/anomic/http/httpHeader.java b/source/de/anomic/http/httpHeader.java
index 3b04928db..e36a00311 100644
--- a/source/de/anomic/http/httpHeader.java
+++ b/source/de/anomic/http/httpHeader.java
@@ -209,7 +209,7 @@ public final class httpHeader extends TreeMap implements Map {
 	if (s.charAt(2) == ',') s = s.substring(0, 2) + s.substring(3); // ommit comma after day of week
 	if ((s.charAt(0) > '9') && (s.length() > 20) && (s.charAt(2) == ' ')) s = s.substring(3);
 	if (s.length() > 20) s = s.substring(0, 20).trim(); // truncate remaining, since that must be wrong
-        if (s.indexOf("Mrz") > 0) s.replaceAll("Mrz", "March");
+        if (s.indexOf("Mrz") > 0) s = s.replaceAll("Mrz", "March");
 	try {
 	    return EMLFormatter.parse(s);
 	} catch (java.text.ParseException e) {
diff --git a/source/de/anomic/net/ftpc.java b/source/de/anomic/net/ftpc.java
index df3e180f2..ef5f19149 100644
--- a/source/de/anomic/net/ftpc.java
+++ b/source/de/anomic/net/ftpc.java
@@ -1872,7 +1872,7 @@ cd ..
 	    c.exec("open " + host, false);
 	    c.exec("user " + account + " " + password, false);
 	    if (remotePath != null) {
-                remotePath.replace('\\', '/');
+            remotePath = remotePath.replace('\\', '/');
                 c.exec("cd " + remotePath, false);
             }
 	    c.exec("binary", false);
diff --git a/source/de/anomic/plasma/plasmaHTCache.java b/source/de/anomic/plasma/plasmaHTCache.java
index 98ba85b36..4d1b2fdd9 100644
--- a/source/de/anomic/plasma/plasmaHTCache.java
+++ b/source/de/anomic/plasma/plasmaHTCache.java
@@ -396,7 +396,7 @@ public final class plasmaHTCache {
 	if (!(remotePath.startsWith("/"))) remotePath = "/" + remotePath;
 	if (remotePath.endsWith("/")) remotePath = remotePath + "ndx";
         if (remotePath.indexOf('#') > 0) remotePath.substring(0, remotePath.indexOf('#'));
-        remotePath.replace('?', '_'); remotePath.replace('&', '_'); // yes this is not reversible, but that is not needed
+        remotePath = remotePath.replace('?', '_'); remotePath = remotePath.replace('&', '_'); // yes this is not reversible, but that is not needed
 	int port = url.getPort();
 	if (port < 0) port = 80;
 	return new File(this.cachePath, url.getHost() + ((port == 80) ? "" : ("+" + port)) + remotePath);