Index: openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl,v
diff -u -r1.48 -r1.49
--- openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl	27 Oct 2014 16:42:01 -0000	1.48
+++ openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl	27 Apr 2015 15:28:21 -0000	1.49
@@ -615,12 +615,16 @@
           #
           # See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html (14.16)
           #
-          ns_log notice "### ignore invalid <$range>, pos > size-1, Content-Range: bytes $from-$to/$size // $ranges"
+          ns_log notice "### ignore invalid range <$range>, pos > size-1, Content-Range: bytes $from-$to/$size // $ranges"
         }
       } elseif {[llength $ranges]>1} {
         ns_log warning "Multiple ranges are currently not supported, ignoring range request"
       }
-      my write_headers $status_code $mime_type $bytes
+      if {$::xo::naviserver && ![string match text/* $mime_type]} {
+        my write_headers -binary -- $status_code $mime_type $bytes
+      } else {
+        my write_headers $status_code $mime_type $bytes
+      }
     }
 
     if {$bytes == 0} {