diff --git a/ktapi/KTAPIFolder.inc.php b/ktapi/KTAPIFolder.inc.php
index 4a669b9..2085307 100644
--- a/ktapi/KTAPIFolder.inc.php
+++ b/ktapi/KTAPIFolder.inc.php
@@ -443,6 +443,11 @@ class KTAPI_Folder extends KTAPI_FolderItem
 
 		$filename = basename($filename);
 		$documenttypeid = KTAPI::get_documenttypeid($documenttype);
+		if (PEAR::isError($documenttypeid))
+		{
+		    return new PEAR_Error('The document type could not be resolved or is disabled: ' . $documenttype);
+		}
+
 
 		$options = array(
 			'contents' => new KTFSFileLike($tempfilename),
diff --git a/ktwebservice/webservice.php b/ktwebservice/webservice.php
index 9ca45ff..21bf718 100644
--- a/ktwebservice/webservice.php
+++ b/ktwebservice/webservice.php
@@ -1418,7 +1418,7 @@ class KTWebService
 		}
 
 		// write to the temporary file
-		$fp=fopen($tempfilename, 'wt');
+		$fp=fopen($tempfilename, 'wb');
 		if ($fp === false)
 		{
 			$response=array(
@@ -1552,7 +1552,7 @@ class KTWebService
     	}
 
 		// write to the temporary file
-		$fp=fopen($tempfilename, 'wt');
+		$fp=fopen($tempfilename, 'wb');
 		if ($fp === false)
 		{
 			$response=array(
@@ -1678,7 +1678,7 @@ class KTWebService
     		$oStorage =& KTStorageManagerUtil::getSingleton();
             $filename = $oStorage->temporaryFile($document);
 
-    		$fp=fopen($filename,'rt');
+    		$fp=fopen($filename,'rb');
     		if ($fp === false)
     		{
     			$response['message'] = 'The file is not in the storage system. Please contact an administrator!';
@@ -1824,7 +1824,7 @@ class KTWebService
     		$oStorage =& KTStorageManagerUtil::getSingleton();
             $filename = $oStorage->temporaryFile($document);
 
-    		$fp=fopen($filename,'rt');
+    		$fp=fopen($filename,'rb');
     		if ($fp === false)
     		{
     			$response['message'] = 'The file is not in the storage system. Please contact an administrator!';