Index: server/config.c
===================================================================
--- server/config.c	(revision 952555)
+++ server/config.c	(working copy)
@@ -312,10 +312,10 @@
     return create_empty_config(p);
 }
 
-static int ap_invoke_filter_init(ap_filter_t *filters)
+static int ap_invoke_filter_init(request_rec *r, ap_filter_t *filters)
 {
     while (filters) {
-        if (filters->frec->filter_init_func) {
+        if (filters->frec->filter_init_func && filters->r == r) {
             int result = filters->frec->filter_init_func(filters);
             if (result != OK) {
                 return result;
@@ -354,11 +354,11 @@
      * run their init function to let them do any magic before we could
      * start generating data.
      */
-    result = ap_invoke_filter_init(r->input_filters);
+    result = ap_invoke_filter_init(r, r->input_filters);
     if (result != OK) {
         return result;
     }
-    result = ap_invoke_filter_init(r->output_filters);
+    result = ap_invoke_filter_init(r, r->output_filters);
     if (result != OK) {
         return result;
     }