diff --git a/application/helpers/admin/import_helper.php b/application/helpers/admin/import_helper.php
index e1ce046e620..34618269ba6 100644
--- a/application/helpers/admin/import_helper.php
+++ b/application/helpers/admin/import_helper.php
@@ -2111,19 +2111,15 @@ function TSVImportSurvey($sFullFilePath)
 
     $file = stream_get_contents($handle);
     fclose($handle);
-
     // fix Excel non-breaking space
     $file = str_replace("0xC20xA0",' ',$file);
     // Replace all different newlines styles with \n
     $file = preg_replace('~\R~u', "\n", $file);
-    $filelines = explode("\n",$file);
-    $row = array_shift($filelines);
-    $headers = explode("\t",$row);
-    $rowheaders = array();
-    foreach ($headers as $header)
-    {
-        $rowheaders[] = trim($header);
-    }
+    $tmp = fopen('php://temp', 'r+');
+    fwrite($tmp,$file);
+    rewind($tmp);
+    $rowheaders = fgetcsv($tmp,0,"\t",'"');
+    $rowheaders = array_map('trim',$rowheaders);
     // remove BOM from the first header cell, if needed
     $rowheaders[0] = preg_replace("/^\W+/","",$rowheaders[0]);
     if (preg_match('/class$/',$rowheaders[0]))
@@ -2132,12 +2128,9 @@ function TSVImportSurvey($sFullFilePath)
     }
 
     $adata = array();
-    foreach ($filelines as $rowline)
-    {
+    while (($row = fgetcsv($tmp,0,"\t",'"')) !== FALSE) {
         $rowarray = array();
-        $row = explode("\t",$rowline);
-        for ($i = 0; $i < count($rowheaders); ++$i)
-        {
+        for ($i = 0; $i < count($rowheaders); ++$i) {
             $val = (isset($row[$i]) ? $row[$i] : '');
             // if Excel was used, it surrounds strings with quotes and doubles internal double quotes.  Fix that.
             if (preg_match('/^".*"$/',$val))
@@ -2148,7 +2141,7 @@ function TSVImportSurvey($sFullFilePath)
         }
         $adata[] = $rowarray;
     }
-
+    fclose($tmp);
     $results['defaultvalues']=0;
     $results['answers']=0;
     $results['surveys']=0;
diff --git a/application/third_party/pclzip/pclzip.lib.php b/application/third_party/pclzip/pclzip.lib.php
index c0ef61681d1..515adde8dd8 100644
--- a/application/third_party/pclzip/pclzip.lib.php
+++ b/application/third_party/pclzip/pclzip.lib.php
@@ -1837,14 +1837,17 @@ function privOptionDefaultThreshold(&$p_options)
     $v_memory_limit = trim($v_memory_limit);
     $last = strtolower(substr($v_memory_limit, -1));
  
-    if($last == 'g')
+    if($last == 'g') {
         //$v_memory_limit = $v_memory_limit*1024*1024*1024;
         $v_memory_limit = $v_memory_limit*1073741824;
-    if($last == 'm')
+    }
+    if($last == 'm') {
         //$v_memory_limit = $v_memory_limit*1024*1024;
-        $v_memory_limit = $v_memory_limit*1048576;
-    if($last == 'k')
+        $v_memory_limit = ((int) $v_memory_limit) * 1048576;
+    }
+    if($last == 'k') {
         $v_memory_limit = $v_memory_limit*1024;
+    }
             
     $p_options[PCLZIP_OPT_TEMP_FILE_THRESHOLD] = floor($v_memory_limit*PCLZIP_TEMPORARY_FILE_RATIO);