diff -up pygobject-3.2.2/gi/pygi-argument.c.fix-argument-to-array pygobject-3.2.2/gi/pygi-argument.c
--- pygobject-3.2.2/gi/pygi-argument.c.fix-argument-to-array	2012-08-13 14:04:12.042265495 -0400
+++ pygobject-3.2.2/gi/pygi-argument.c	2012-08-13 14:05:39.579171131 -0400
@@ -31,6 +31,44 @@
 #include <pyglib-python-compat.h>
 #include <pyglib.h>
 
+static gboolean
+gi_argument_to_gssize (GIArgument *arg_in,
+                       GITypeTag  type_tag,
+                       gssize *gssize_out)
+{
+    switch (type_tag) {
+      case GI_TYPE_TAG_INT8:
+          *gssize_out = arg_in->v_int8;
+          return TRUE;
+      case GI_TYPE_TAG_UINT8:
+          *gssize_out = arg_in->v_uint8;
+          return TRUE;
+      case GI_TYPE_TAG_INT16:
+          *gssize_out = arg_in->v_int16;
+          return TRUE;
+      case GI_TYPE_TAG_UINT16:
+          *gssize_out = arg_in->v_uint16;
+          return TRUE;
+      case GI_TYPE_TAG_INT32:
+          *gssize_out = arg_in->v_int32;
+          return TRUE;
+      case GI_TYPE_TAG_UINT32:
+          *gssize_out = arg_in->v_uint32;
+          return TRUE;
+      case GI_TYPE_TAG_INT64:
+          *gssize_out = arg_in->v_int64;
+          return TRUE;
+      case GI_TYPE_TAG_UINT64:
+          *gssize_out = arg_in->v_uint64;
+          return TRUE;
+      default:
+          PyErr_Format (PyExc_TypeError,
+                        "Unable to marshal %s to gssize",
+                        g_type_tag_to_string(type_tag));
+          return FALSE;
+    }
+}
+
 void
 _pygi_hash_pointer_to_arg (GIArgument *arg,
                            GITypeTag  type_tag)
@@ -706,6 +744,7 @@ check_number_release:
 GArray *
 _pygi_argument_to_array (GIArgument  *arg,
                          GIArgument  *args[],
+                         GICallableInfo *callable_info,                  
                          GITypeInfo *type_info,
                          gboolean is_method)
 {
@@ -732,12 +771,20 @@ _pygi_argument_to_array (GIArgument  *ar
         length = g_type_info_get_array_fixed_size (type_info);
         if (length < 0) {
             gint length_arg_pos;
+            GIArgInfo *length_arg_info;
+            GITypeInfo *length_type_info;
 
             length_arg_pos = g_type_info_get_array_length (type_info);
             g_assert (length_arg_pos >= 0);
 
-            /* FIXME: Take into account the type of the argument. */
-            length = args[length_arg_pos]->v_int;
+            g_assert (callable_info);
+            length_arg_info = g_callable_info_get_arg(callable_info, length_arg_pos);
+            length_type_info = g_arg_info_get_type(length_arg_info);
+            if (!gi_argument_to_gssize (args[length_arg_pos],
+                                        g_type_info_get_tag(length_type_info),
+                                        &length)) {
+                return NULL;
+            }
         }
     }
 
diff -up pygobject-3.2.2/gi/pygi-argument.h.fix-argument-to-array pygobject-3.2.2/gi/pygi-argument.h
--- pygobject-3.2.2/gi/pygi-argument.h.fix-argument-to-array	2012-08-13 14:04:12.000000000 -0400
+++ pygobject-3.2.2/gi/pygi-argument.h	2012-08-13 14:05:57.652945179 -0400
@@ -50,6 +50,7 @@ gint _pygi_g_registered_type_info_check_
 
 GArray* _pygi_argument_to_array (GIArgument  *arg,
                                  GIArgument  *args[],
+                                 GICallableInfo *callable_info,
                                  GITypeInfo *type_info,
                                  gboolean    is_method);
 
diff -up pygobject-3.2.2/gi/pygi-closure.c.fix-argument-to-array pygobject-3.2.2/gi/pygi-closure.c
diff -up pygobject-3.2.2/gi/pygi-info.c.fix-argument-to-array pygobject-3.2.2/gi/pygi-info.c
--- pygobject-3.2.2/gi/pygi-info.c.fix-argument-to-array	2012-05-14 12:49:12.000000000 -0400
+++ pygobject-3.2.2/gi/pygi-info.c	2012-08-13 14:06:37.788443416 -0400
@@ -1236,7 +1236,7 @@ _wrap_g_field_info_get_value (PyGIBaseIn
 
     if ( (g_type_info_get_tag (field_type_info) == GI_TYPE_TAG_ARRAY) &&
             (g_type_info_get_array_type (field_type_info) == GI_ARRAY_TYPE_C)) {
-        value.v_pointer = _pygi_argument_to_array (&value, NULL,
+        value.v_pointer = _pygi_argument_to_array (&value, NULL, NULL,
                                                    field_type_info, FALSE);
     }
 
diff -up pygobject-3.2.2/gi/pygi-signal-closure.c.fix-argument-to-array pygobject-3.2.2/gi/pygi-signal-closure.c