diff --git a/src/calibre/gui2/convert/gui_conversion.py b/src/calibre/gui2/convert/gui_conversion.py
index 148dc328ad..3072b8757a 100644
--- a/src/calibre/gui2/convert/gui_conversion.py
+++ b/src/calibre/gui2/convert/gui_conversion.py
@@ -27,13 +27,8 @@ def gui_catalog(fmt, title, dbspec, ids, out_file_name, sync, fmt_options, conne
         notification=DummyReporter(), log=None):
     if log is None:
         log = Log()
-    if dbspec is None:
-        from calibre.utils.config import prefs
-        from calibre.library.database2 import LibraryDatabase2
-        dbpath = prefs['library_path']
-        db = LibraryDatabase2(dbpath)
-    else: # To be implemented in the future
-        pass
+    from calibre.library import db
+    db = db()
 
     # Create a minimal OptionParser that we can append to
     parser = OptionParser()
diff --git a/src/calibre/gui2/preferences/main.py b/src/calibre/gui2/preferences/main.py
index 6524faec2d..d55f2d90d1 100644
--- a/src/calibre/gui2/preferences/main.py
+++ b/src/calibre/gui2/preferences/main.py
@@ -10,8 +10,8 @@ from functools import partial
 
 from PyQt4.Qt import QMainWindow, Qt, QIcon, QStatusBar, QFont, QWidget, \
         QScrollArea, QStackedWidget, QVBoxLayout, QLabel, QFrame, QKeySequence, \
-        QToolBar, QSize, pyqtSignal, QSizePolicy, QToolButton, QAction, \
-        QPushButton, QHBoxLayout
+        QToolBar, QSize, pyqtSignal, QPixmap, QToolButton, QAction, \
+        QDialogButtonBox, QHBoxLayout
 
 from calibre.constants import __appname__, __version__, islinux, isosx
 from calibre.gui2 import gprefs, min_available_height, available_width, \
@@ -20,6 +20,8 @@ from calibre.gui2.preferences import init_gui, AbortCommit, get_plugin
 from calibre.customize.ui import preferences_plugins
 from calibre.utils.ordered_dict import OrderedDict
 
+ICON_SIZE = 32
+
 class StatusBar(QStatusBar): # {{{
 
     def __init__(self, parent=None):
@@ -42,6 +44,32 @@ class StatusBar(QStatusBar): # {{{
 
 # }}}
 
+class BarTitle(QWidget):
+
+    def __init__(self, parent=None):
+        QWidget.__init__(self, parent)
+        self._layout = QHBoxLayout()
+        self.setLayout(self._layout)
+        self._layout.addStretch(10)
+        self.icon = QLabel('')
+        self._layout.addWidget(self.icon)
+        self.title = QLabel('')
+        self.title.setStyleSheet('QLabel { font-weight: bold }')
+        self.title.setAlignment(Qt.AlignLeft | Qt.AlignCenter)
+        self._layout.addWidget(self.title)
+        self._layout.addStretch(10)
+
+    def show_plugin(self, plugin):
+        self.pmap = QPixmap(plugin.icon).scaled(ICON_SIZE, ICON_SIZE,
+                Qt.KeepAspectRatio, Qt.SmoothTransformation)
+        self.icon.setPixmap(self.pmap)
+        self.title.setText(plugin.gui_name)
+        tt = plugin.description
+        self.setStatusTip(tt)
+        tt = textwrap.fill(tt)
+        self.setToolTip(tt)
+        self.setWhatsThis(tt)
+
 class Category(QWidget): # {{{
 
     plugin_activated = pyqtSignal(object)
@@ -88,7 +116,6 @@ class Category(QWidget): # {{{
 class Browser(QScrollArea): # {{{
 
     show_plugin = pyqtSignal(object)
-    close_signal = pyqtSignal()
 
     def __init__(self, parent=None):
         QScrollArea.__init__(self, parent)
@@ -119,14 +146,6 @@ class Browser(QScrollArea): # {{{
         self.container = QWidget(self)
         self.container.setLayout(self._layout)
         self.setWidget(self.container)
-        if isosx:
-            self._osxl = QHBoxLayout()
-            self.close_button = QPushButton(_('Close'))
-            self.close_button.clicked.connect(self.close_requested)
-            self._osxl.addStretch(10)
-            self._osxl.addWidget(self.close_button)
-            #self._osxl.addStretch(10)
-            self._layout.addLayout(self._osxl)
 
         for name, plugins in self.category_map.items():
             w = Category(name, plugins, self)
@@ -134,8 +153,6 @@ class Browser(QScrollArea): # {{{
             self._layout.addWidget(w)
             w.plugin_activated.connect(self.show_plugin.emit)
 
-    def close_requested(self, *args):
-        self.close_signal.emit()
 
 # }}}
 
@@ -177,9 +194,15 @@ class Preferences(QMainWindow):
         self.setStatusBar(self.status_bar)
 
         self.stack = QStackedWidget(self)
-        self.setCentralWidget(self.stack)
+        self.cw = QWidget(self)
+        self.cw.setLayout(QVBoxLayout())
+        self.cw.layout().addWidget(self.stack)
+        self.bb = QDialogButtonBox(QDialogButtonBox.Close)
+        self.cw.layout().addWidget(self.bb)
+        self.bb.rejected.connect(self.close, type=Qt.QueuedConnection)
+        self.setCentralWidget(self.cw)
+        self.bb.setVisible(isosx)
         self.browser = Browser(self)
-        self.browser.close_signal.connect(self.close, type=Qt.QueuedConnection)
         self.browser.show_plugin.connect(self.show_plugin)
         self.stack.addWidget(self.browser)
         self.scroll_area = QScrollArea(self)
@@ -189,7 +212,7 @@ class Preferences(QMainWindow):
         self.bar = QToolBar(self)
         self.addToolBar(self.bar)
         self.bar.setVisible(False)
-        self.bar.setIconSize(QSize(32, 32))
+        self.bar.setIconSize(QSize(ICON_SIZE, ICON_SIZE))
         self.bar.setMovable(False)
         self.bar.setFloatable(False)
         self.bar.setToolButtonStyle(Qt.ToolButtonTextBesideIcon)
@@ -197,13 +220,8 @@ class Preferences(QMainWindow):
                 self.commit)
         self.cancel_action = self.bar.addAction(QIcon(I('window-close.png')),
                 _('&Cancel'),                self.cancel)
-        self.bar_filler = QLabel('')
-        self.bar_filler.setSizePolicy(QSizePolicy.Expanding,
-                QSizePolicy.Preferred)
-        self.bar_filler.setStyleSheet(
-            'QLabel { font-weight: bold }')
-        self.bar_filler.setAlignment(Qt.AlignHCenter | Qt.AlignCenter)
-        self.bar.addWidget(self.bar_filler)
+        self.bar_title = BarTitle(self.bar)
+        self.bar.addWidget(self.bar_title)
         self.restore_action = self.bar.addAction(QIcon(I('clear_left.png')),
                 _('Restore &defaults'), self.restore_defaults)
         for ac, tt in [('apply', _('Save changes')),
@@ -247,7 +265,7 @@ class Preferences(QMainWindow):
         self.restore_action.setToolTip(textwrap.fill(tt))
         self.restore_action.setWhatsThis(textwrap.fill(tt))
         self.restore_action.setStatusTip(tt)
-        self.bar_filler.setText(plugin.gui_name)
+        self.bar_title.show_plugin(plugin)
         self.setWindowIcon(QIcon(plugin.icon))
         self.bar.setVisible(True)