Index: units/files/files_config.php
===================================================================
--- units/files/files_config.php	(revision 13557)
+++ units/files/files_config.php	(working copy)
@@ -78,7 +78,7 @@
 					'video/x-flv', 'video/quicktime', 'video/x-sgi-movie', 'video/mpeg',
 					'video/x-msvideo', 'video/x-msvideo', 'application/x-shockwave-flash', 'video/x-fli',
 					'application/pdf', 'application/msexcel', 'application/vnd.ms-excel', 'application/msword',
-					'application/mspowerpoint', 'application/zip', 'plain/text', 'application/x-gzip',
+					'application/mspowerpoint', 'application/zip', 'text/plain', 'application/x-gzip',
 				),
 				'not_null' => 1, 'required' => 1, 'default' => ''
 			),