diff -Naur scim-bridge-0.4.15.orig/client-qt/qt4/Makefile.am scim-bridge-0.4.15/client-qt/qt4/Makefile.am
--- scim-bridge-0.4.15.orig/client-qt/qt4/Makefile.am	2009-01-18 01:57:40.000000000 +0900
+++ scim-bridge-0.4.15/client-qt/qt4/Makefile.am	2009-01-25 14:58:09.000000000 +0900
@@ -24,7 +24,7 @@
 
 noinst_HEADERS = ../scim-bridge-client-qt.h ../scim-bridge-client-imcontext-qt.h ../scim-bridge-client-key-event-utility-qt.h ../scim-bridge-client-common-qt.h
 
-moduledir = @QT4_PREFIX@/plugins/inputmethods
+moduledir = @QT4_LIBDIR@/plugins/inputmethods
 module_LTLIBRARIES = im-scim-bridge.la
 
 im_scim_bridge_la_SOURCES = ../im-scim-bridge-qt.cpp \
diff -Naur scim-bridge-0.4.15.orig/client-qt/scim-bridge-client-imcontext-qt.cpp scim-bridge-0.4.15/client-qt/scim-bridge-client-imcontext-qt.cpp
--- scim-bridge-0.4.15.orig/client-qt/scim-bridge-client-imcontext-qt.cpp	2008-11-02 15:44:46.000000000 +0900
+++ scim-bridge-0.4.15/client-qt/scim-bridge-client-imcontext-qt.cpp	2009-01-25 15:04:34.000000000 +0900
@@ -219,6 +219,12 @@
 void ScimBridgeClientIMContextImpl::setFocusWidget (QWidget *widget)
 {
     scim_bridge_pdebugln (4, "ScimBridgeClientIMContextImpl::setFocusWidget ()");
+
+    if (focused_imcontext != NULL) {
+        focused_imcontext->focus_out ();
+        focused_imcontext = NULL;
+    }
+
     QInputContext::setFocusWidget (widget);
     focus_in ();
     update ();
@@ -442,8 +448,15 @@
         }
     }
 
+#ifdef QT4
+    if (preedit_shown) {
+        set_preedit_shown (false);
+        update_preedit ();
+    }
+#else
     set_preedit_shown (false);
     update_preedit ();
+#endif
 
     focused_imcontext = NULL;
 }
diff -Naur scim-bridge-0.4.15.orig/configure.ac scim-bridge-0.4.15/configure.ac
--- scim-bridge-0.4.15.orig/configure.ac	2009-01-18 02:24:32.000000000 +0900
+++ scim-bridge-0.4.15/configure.ac	2009-01-25 14:58:06.000000000 +0900
@@ -105,6 +105,10 @@
     QT4_PREFIX=`$PKG_CONFIG --variable=prefix QtCore`
   fi
   AC_SUBST(QT4_PREFIX)
+  if test -z "$QT4_LIBDIR"; then
+    QT4_LIBDIR=`$PKG_CONFIG --variable=libdir QtCore`
+  fi
+  AC_SUBST(QT4_LIBDIR)
   enable_qt4_immodule="yes";
 fi