diff --git a/configure.ac b/configure.ac
index c82e2e86..c21cf9cf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.60)
-AC_INIT(libminigui, 5.0.0)
+AC_INIT(libminigui, 5.0.1)
 AC_CONFIG_SRCDIR(src/main/main.c)
 
 dnl Set various version strings - taken gratefully from the SDL sources
@@ -16,9 +16,9 @@ dnl Set various version strings - taken gratefully from the SDL sources
 #
 MINIGUI_MAJOR_VERSION=5
 MINIGUI_MINOR_VERSION=0
-MINIGUI_MICRO_VERSION=0
-MINIGUI_INTERFACE_AGE=0
-MINIGUI_BINARY_AGE=0
+MINIGUI_MICRO_VERSION=1
+MINIGUI_INTERFACE_AGE=1
+MINIGUI_BINARY_AGE=1
 MINIGUI_VERSION=$MINIGUI_MAJOR_VERSION.$MINIGUI_MINOR_VERSION.$MINIGUI_MICRO_VERSION
 
 AC_SUBST(MINIGUI_MAJOR_VERSION)
diff --git a/src/kernel/desktop.c b/src/kernel/desktop.c
index a35a4f9c..1fb1d86c 100644
--- a/src/kernel/desktop.c
+++ b/src/kernel/desktop.c
@@ -188,7 +188,7 @@ static BOOL subtract_rgn_by_node (PCLIPRGN region, const ZORDERINFO* zi,
     else
         SubtractClipRect(region, &(node->rc));
 
-    return !IsEmptyClipRgn(region);
+    return TRUE; // !IsEmptyClipRgn(region); We must return TRUE for this callback.
 }
 
 #else   /* not defined _MGSCHEMA_COMPOSITING */
@@ -505,8 +505,13 @@ static BOOL _cb_update_znode (void* context,
 {
     const RECT* rc = (RECT*)context;
 
+    _DBG_PRINTF ("Checking window (%s), visibility: %s, referred: %s\n", znode->caption,
+          (znode->flags & ZOF_VISIBLE)? "TRUE" : "FALSE",
+          (znode->flags & ZOF_IF_REFERENCE)? "TRUE" : "FALSE");
+
     if (znode->flags & ZOF_VISIBLE &&
             znode->flags & ZOF_IF_REFERENCE) {
+        _DBG_PRINTF ("Widnow (%s) will be updated\n", znode->caption);
         update_client_window (znode, rc);
         znode->flags &= ~ZOF_IF_REFERENCE;
         return TRUE;