Index: openacs-4/packages/xowiki/www/xinha/file-selector.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/www/xinha/file-selector.tcl,v
diff -u -N -r1.20 -r1.21
--- openacs-4/packages/xowiki/www/xinha/file-selector.tcl	15 Sep 2017 07:00:27 -0000	1.20
+++ openacs-4/packages/xowiki/www/xinha/file-selector.tcl	12 Jun 2018 09:13:16 -0000	1.21
@@ -302,9 +302,9 @@
     set title $name
   }
 
-  set file_upload_name [fs::remove_special_file_system_characters \
-                            -string $file_upload_name]
-
+  set file_upload_name [ad_sanitize_filename \
+                            -tolower \
+                            $file_upload_name]
   if { $content_size ne "" } {
     incr content_size_total $content_size
   }