diff --git a/manual/gui.rst b/manual/gui.rst
index 8105073bcc..607d51c000 100644
--- a/manual/gui.rst
+++ b/manual/gui.rst
@@ -488,12 +488,12 @@ Book Details
 
 The Book Details display shows the cover and all the metadata for the currently
 selected book. It can be hidden via the button in the lower right corner of the
-main calibre window. The author names shown in the Book Detail panel are
+main calibre window. The author names shown in the Book Details panel are
 clickable, they will by default take you to the Wikipedia page for the author.
 This can be customized by right clicking on the author name and selecting
 Manage this author.
 
-Similarly, if you download metadata for the book, the Book details panel will
+Similarly, if you download metadata for the book, the Book Details panel will
 automatically show you links pointing to the web pages for the book on amazon,
 worldcat, etc. from where the metadata was downloaded.
 
diff --git a/src/calibre/devices/blackberry/driver.py b/src/calibre/devices/blackberry/driver.py
index 77fc5dfe65..381b28db7c 100644
--- a/src/calibre/devices/blackberry/driver.py
+++ b/src/calibre/devices/blackberry/driver.py
@@ -35,7 +35,7 @@ class PLAYBOOK(USBMS):
 
     name           = 'Blackberry Playbook Interface'
     gui_name       = 'Playbook'
-    description    = _('Communicate with the Blackberry playbook.')
+    description    = _('Communicate with the Blackberry Playbook.')
     author         = _('Kovid Goyal')
     supported_platforms = ['windows', 'linux', 'osx']
 
diff --git a/src/calibre/devices/cybook/driver.py b/src/calibre/devices/cybook/driver.py
index 7f47d75c65..46837675d8 100644
--- a/src/calibre/devices/cybook/driver.py
+++ b/src/calibre/devices/cybook/driver.py
@@ -21,8 +21,8 @@ import calibre.devices.cybook.t4b as t4b
 class CYBOOK(USBMS):
 
     name           = 'Cybook Gen 3 / Opus Device Interface'
-    gui_name       = 'Cybook Gen 3 / Opus'
-    description    = _('Communicate with the Cybook Gen 3 / Opus eBook reader.')
+    gui_name       = 'Cybook Gen 3/Opus'
+    description    = _('Communicate with the Cybook Gen 3/Opus eBook reader.')
     author         = 'John Schember'
     supported_platforms = ['windows', 'osx', 'linux']
 
diff --git a/src/calibre/gui2/preferences/look_feel.ui b/src/calibre/gui2/preferences/look_feel.ui
index 085d4a87d4..08f134421b 100644
--- a/src/calibre/gui2/preferences/look_feel.ui
+++ b/src/calibre/gui2/preferences/look_feel.ui
@@ -25,7 +25,7 @@
         <normaloff>:/images/lt.png</normaloff>:/images/lt.png</iconset>
       </attribute>
       <attribute name="title">
-       <string>Main Interface</string>
+       <string>Main interface</string>
       </attribute>
       <layout class="QGridLayout" name="gridLayout_9">
        <item row="9" column="0">