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 -r1.4 -r1.5
--- openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl	1 Oct 2006 19:11:07 -0000	1.4
+++ openacs-4/packages/xotcl-core/tcl/bgdelivery-procs.tcl	22 Nov 2006 15:11:45 -0000	1.5
@@ -142,7 +142,12 @@
   blocking a request thread. This is especially important when large files are 
   requested over slow (e.g. dial-ip) connections.
 } {
-  bgdelivery returnfile $statuscode $mime_type $filename
+    if {[catch {ns_conn contentsentlength}]} {
+	ns_returnfile $statuscode $mime_type $filename
+    } else {    
+	bgdelivery returnfile $statuscode $mime_type $filename
+    }
+
 }
 
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