--- a/src/modules/perl/modperl_env.c.orig	2015-12-28 11:42:26.604632457 +0100
+++ b/src/modules/perl/modperl_env.c	2015-12-28 12:36:35.305228288 +0100
@@ -120,6 +120,7 @@
     const apr_array_header_t *array;
     apr_table_entry_t *elts;
 
+    modperl_env_init(aTHX);
     modperl_env_untie(mg_flags);
 
     array = apr_table_elts(table);
@@ -431,13 +432,11 @@
 }
 
 /* to store the original virtual tables
- * these are global, not per-interpreter
+ * handy access to perl's original virtual tables
  */
-static MGVTBL MP_PERL_vtbl_env;
-static MGVTBL MP_PERL_vtbl_envelem;
 
 #define MP_PL_vtbl_call(name, meth) \
-    MP_PERL_vtbl_##name.svt_##meth(aTHX_ sv, mg)
+    PL_vtbl_##name.svt_##meth(aTHX_ sv, mg)
 
 #define MP_dENV_KEY \
     STRLEN klen; \
@@ -534,6 +533,26 @@
     return 0;
 }
 
+static int modperl_env_magic_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
+{
+    MP_TRACE_e(MP_FUNC, "setting up %%ENV element magic");
+    sv_magicext(nsv, mg->mg_obj, toLOWER(mg->mg_type), &MP_vtbl_envelem, name, namlen);
+
+    return 1;
+}
+
+static int modperl_env_magic_local_all(pTHX_ SV *nsv, MAGIC *mg)
+{
+    MAGIC *nmg;
+    MP_TRACE_e(MP_FUNC, "localizing %%ENV");
+    nmg = sv_magicext(nsv, mg->mg_obj, mg->mg_type, &MP_vtbl_env, (char*)NULL, 0);
+    nmg->mg_ptr = mg->mg_ptr;
+    nmg->mg_flags |= MGf_COPY;
+    nmg->mg_flags |= MGf_LOCAL;
+
+    return 1;
+}
+
 static int modperl_env_magic_set(pTHX_ SV *sv, MAGIC *mg)
 {
     request_rec *r = (request_rec *)EnvMgObj;
@@ -625,15 +644,18 @@
 #endif
 
 /* override %ENV virtual tables with our own */
-static MGVTBL MP_vtbl_env = {
+MGVTBL MP_vtbl_env = {
     0,
     modperl_env_magic_set_all,
     0,
     modperl_env_magic_clear_all,
-    0
+    0,
+    modperl_env_magic_copy,
+    0,
+    modperl_env_magic_local_all
 };
 
-static MGVTBL MP_vtbl_envelem = {
+MGVTBL MP_vtbl_envelem = {
     0,
     modperl_env_magic_set,
     0,
@@ -641,20 +663,62 @@
     0
 };
 
-void modperl_env_init(void)
+void modperl_env_init(pTHX)
 {
-    /* save originals */
-    StructCopy(&PL_vtbl_env, &MP_PERL_vtbl_env, MGVTBL);
-    StructCopy(&PL_vtbl_envelem, &MP_PERL_vtbl_envelem, MGVTBL);
+    MAGIC *mg;
 
-    /* replace with our versions */
-    StructCopy(&MP_vtbl_env, &PL_vtbl_env, MGVTBL);
-    StructCopy(&MP_vtbl_envelem, &PL_vtbl_envelem, MGVTBL);
+    /* Find the 'E' magic on %ENV */
+    if (!my_perl)
+        return;
+    if (!PL_envgv)
+        return;
+    if (!SvRMAGICAL(ENVHV))
+        return;
+    mg = mg_find((const SV *)ENVHV, PERL_MAGIC_env);
+    if (!mg)
+        return;
+       
+    /* Ignore it if it isn't perl's original version */
+    if (mg->mg_virtual != &PL_vtbl_env)
+        return;
+
+    MP_TRACE_e(MP_FUNC, "env_init - ptr: %x obj: %x flags: %x",
+               mg->mg_ptr, mg->mg_obj, mg->mg_flags);
+
+    /* Remove it */
+    mg_free_type((SV*)ENVHV, PERL_MAGIC_env);
+
+    /* Add our version instead */
+    mg = sv_magicext((SV*)ENVHV, (SV*)NULL, PERL_MAGIC_env, &MP_vtbl_env, (char*)NULL, 0);
+    mg->mg_flags |= MGf_COPY;
+    mg->mg_flags |= MGf_LOCAL;
 }
 
-void modperl_env_unload(void)
+void modperl_env_unload(pTHX)
 {
-    /* restore originals */
-    StructCopy(&MP_PERL_vtbl_env, &PL_vtbl_env, MGVTBL);
-    StructCopy(&MP_PERL_vtbl_envelem, &PL_vtbl_envelem, MGVTBL);
+     MAGIC *mg;
+
+    /* Find the 'E' magic on %ENV */
+    if (!my_perl)
+        return;
+    if (!PL_envgv)
+        return;
+    if (!SvRMAGICAL(ENVHV))
+        return;
+    mg = mg_find((const SV *)ENVHV, PERL_MAGIC_env);
+    if (!mg)
+        return;
+
+    /* Ignore it if it isn't our version */
+    if (mg->mg_virtual != &MP_vtbl_env)
+        return;
+
+    MP_TRACE_e(MP_FUNC, "env_unload - ptr: %x obj: %x flags: %x",
+               mg->mg_ptr, mg->mg_obj, mg->mg_flags);
+
+    /* Remove it */
+    mg_free_type((SV*)ENVHV, PERL_MAGIC_env);
+
+    /* Restore perl's original version */
+    sv_magicext((SV*)ENVHV, (SV*)NULL, PERL_MAGIC_env, &PL_vtbl_env, (char*)NULL, 0);
 }
--- a/src/modules/perl/modperl_env.h.orig	2015-12-28 11:42:34.868727490 +0100
+++ b/src/modules/perl/modperl_env.h	2015-12-28 12:37:47.730041274 +0100
@@ -28,7 +28,7 @@
     MP_magical_tie(ENVHV, mg_flags)
 
 #define modperl_envelem_tie(sv, key, klen) \
-    sv_magic(sv, (SV *)NULL, 'e', key, klen)
+    sv_magicext(sv, (SV *)NULL, PERL_MAGIC_envelem, &MP_vtbl_envelem, key, klen)
 
 void modperl_env_hash_keys(pTHX);
 
@@ -58,8 +58,11 @@
 
 void modperl_env_request_untie(pTHX_ request_rec *r);
 
-void modperl_env_init(void);
+void modperl_env_init(pTHX);
 
-void modperl_env_unload(void);
+void modperl_env_unload(pTHX);
+
+MGVTBL MP_vtbl_env;
+MGVTBL MP_vtbl_envelem;
 
 #endif /* MODPERL_ENV_H */
Index: trunk/src/modules/perl/modperl_perl.c
===================================================================
--- trunk/src/modules/perl/modperl_perl.c	(revision 1717473)
+++ trunk/src/modules/perl/modperl_perl.c	(revision 1717474)
@@ -181,6 +181,8 @@
         }
     }
 
+    modperl_env_unload(perl);
+
     perl_destruct(perl);
 
     /* XXX: big bug in 5.6.1 fixed in 5.7.2+
Index: trunk/src/modules/perl/mod_perl.c
===================================================================
--- trunk/src/modules/perl/mod_perl.c	(revision 1717473)
+++ trunk/src/modules/perl/mod_perl.c	(revision 1717474)
@@ -262,6 +262,8 @@
         exit(1);
     }
 
+    modperl_env_init(aTHX);
+
     /* suspend END blocks to be run at server shutdown */
     endav = PL_endav;
     PL_endav = (AV *)NULL;
@@ -576,9 +578,6 @@
     /* modifies PL_ppaddr */
     modperl_perl_pp_set_all();
 
-    /* modifies PL_vtbl_env{elem} */
-    modperl_env_init();
-
     return APR_SUCCESS;
 }
 
@@ -597,8 +596,6 @@
 
     MP_TRACE_i(MP_FUNC, "mod_perl sys term");
 
-    modperl_env_unload();
-
     modperl_perl_pp_unset_all();
 
     PERL_SYS_TERM();
Index: trunk/t/response/TestModperl/env.pm
===================================================================
--- trunk/t/response/TestModperl/env.pm	(revision 1717473)
+++ trunk/t/response/TestModperl/env.pm	(revision 1717474)
@@ -15,7 +15,7 @@
 sub handler {
     my $r = shift;
 
-    plan $r, tests => 23 + keys(%ENV);
+    plan $r, tests => 23 + 3 * keys(%ENV);
 
     my $env = $r->subprocess_env;
 
@@ -75,6 +75,8 @@
     for my $key (sort keys %ENV) {
         eval { delete $ENV{$key}; };
         ok t_cmp($@, '', $key);
+        ok t_cmp($ENV{$key}, undef, "ENV{$key} is empty");
+        ok t_cmp($env->get($key), undef, "subprocess_env($key) is empty");
     }
 
     Apache2::Const::OK;