diff --git a/iso/kiso.cpp b/iso/kiso.cpp
--- a/iso/kiso.cpp
+++ b/iso/kiso.cpp
@@ -268,7 +268,8 @@
             if (!special) {
                 if (iso->joliet) {
                     for (i = 0;i < (isonum_711(idr->name_len) - 1);i += 2) {
-                        QChar ch(be2me_16(*((ushort*)&(idr->name[i]))));
+                        void *p = &(idr->name[i]);
+                        QChar ch(be2me_16(*(ushort *)p));
                         if (ch == ';') break;
                         path += ch;
                     }
diff --git a/krArc/krarc.cpp b/krArc/krarc.cpp
--- a/krArc/krarc.cpp
+++ b/krArc/krarc.cpp
@@ -347,14 +347,26 @@
         ba.prepend(arcTempDirEnc);
         fd = QT_OPEN(ba, O_CREAT | O_TRUNC | O_WRONLY, initialMode);
     }
+
     QByteArray buffer;
     int readResult;
+    bool isIncomplete = false;
     do {
         dataReq();
         readResult = readData(buffer);
-        ::write(fd, buffer.data(), buffer.size());
+        auto bytesWritten = ::write(fd, buffer.data(), buffer.size());
+        if (bytesWritten < buffer.size()) {
+            isIncomplete = true;
+            break;
+        }
     } while (readResult > 0);
     ::close(fd);
+
+    if (isIncomplete) {
+        error(ERR_COULD_NOT_WRITE, getPath(url));
+        return;
+    }
+
     // pack the file
     KrLinecountingProcess proc;
     proc << putCmd << getPath(arcFile->url()) << localeEncodedString(tempFile);
diff --git a/krusader/JobMan/krjob.cpp b/krusader/JobMan/krjob.cpp
--- a/krusader/JobMan/krjob.cpp
+++ b/krusader/JobMan/krjob.cpp
@@ -53,7 +53,7 @@
                               const QUrl &destination, KIO::JobFlags flags, KIO::CopyJob *job,
                               KIO::DropJob *dropJob)
 {
-    Type type;
+    Type type(Copy);
     QString description;
     switch (mode) {
     case KIO::CopyJob::Copy:
diff --git a/krusader/Synchronizer/synchronizer.cpp b/krusader/Synchronizer/synchronizer.cpp
--- a/krusader/Synchronizer/synchronizer.cpp
+++ b/krusader/Synchronizer/synchronizer.cpp
@@ -1048,8 +1048,11 @@
                         if (g != 0L)
                             newGroupID = g->gr_gid;
                     }
-                    chown((const char *)(leftURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), newOwnerID, (gid_t) - 1);
-                    chown((const char *)(leftURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), (uid_t) - 1, newGroupID);
+                    int status1 = chown((const char *)(leftURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), newOwnerID, (gid_t) - 1);
+                    int status2 = chown((const char *)(leftURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), (uid_t) - 1, newGroupID);
+                    if (status1 < 0 || status2 < 0) {
+                        // synchronizer currently ignores chown errors
+                    }
 
                     chmod((const char *)(leftURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), item->rightMode() & 07777);
 
@@ -1085,8 +1088,11 @@
                         if (g != 0L)
                             newGroupID = g->gr_gid;
                     }
-                    chown((const char *)(rightURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), newOwnerID, (uid_t) - 1);
-                    chown((const char *)(rightURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), (uid_t) - 1, newGroupID);
+                    int status1 = chown((const char *)(rightURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), newOwnerID, (uid_t) - 1);
+                    int status2 = chown((const char *)(rightURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), (uid_t) - 1, newGroupID);
+                    if (status1 < 0 || status2 < 0) {
+                        // synchronizer currently ignores chown errors
+                    }
 
                     chmod((const char *)(rightURL.adjusted(QUrl::StripTrailingSlash).path().toLocal8Bit()), item->leftMode() & 07777);