diff --git a/src/calibre/customize/ui.py b/src/calibre/customize/ui.py
index 04f9b80529..22885edf24 100644
--- a/src/calibre/customize/ui.py
+++ b/src/calibre/customize/ui.py
@@ -289,6 +289,7 @@ def available_input_formats():
         if not is_disabled(plugin):
             for format in plugin.file_types:
                 formats.add(format)
+    formats.add('zip'), formats.add('rar')
     return formats
 
 def output_format_plugins():
diff --git a/src/calibre/devices/bebook/driver.py b/src/calibre/devices/bebook/driver.py
index 5aba34e879..1542346955 100644
--- a/src/calibre/devices/bebook/driver.py
+++ b/src/calibre/devices/bebook/driver.py
@@ -20,7 +20,7 @@ class BEBOOK(USBMS):
     supported_platforms = ['windows', 'osx', 'linux']
 
     # Ordered list of supported formats
-    FORMATS     = ['mobi', 'epub', 'pdf', 'txt']
+    FORMATS     = ['mobi', 'epub', 'pdf', 'rtf', 'txt']
 
     VENDOR_ID   = [0x0525]
     PRODUCT_ID  = [0x8803, 0x6803]
diff --git a/src/calibre/devices/prs500/driver.py b/src/calibre/devices/prs500/driver.py
index 5c97144049..73dd5b543d 100644
--- a/src/calibre/devices/prs500/driver.py
+++ b/src/calibre/devices/prs500/driver.py
@@ -239,6 +239,8 @@ class PRS500(DeviceConfig, DevicePlugin):
         Also initialize the device.
         See the source code for the sequence of initialization commands.
         """
+        if not hasattr(self, 'key'):
+            self.key = '-1\0\0\0\0\0\0'
         self.device = get_device_by_id(self.VENDOR_ID, self.PRODUCT_ID)
         if not self.device:
             raise DeviceError()
diff --git a/src/calibre/devices/usbms/device.py b/src/calibre/devices/usbms/device.py
index 24ad929cbd..50f183a83e 100644
--- a/src/calibre/devices/usbms/device.py
+++ b/src/calibre/devices/usbms/device.py
@@ -727,11 +727,14 @@ class Device(DeviceConfig, DevicePlugin):
                         if r.startswith('.'): r = x[0]+r
                     else:
                         r = x[:-delta]
+                r = r.strip()
+                if not r:
+                    r = x.strip()[0] if x.strip() else 'x'
                 if x is resizable[-1]:
                     filepath = filepath.replace(os.sep+x, os.sep+r)
                 else:
                     filepath = filepath.replace(os.sep+x+os.sep, os.sep+r+os.sep)
-            filepath = filepath.replace(os.sep+os.sep, os.sep)
+            filepath = filepath.replace(os.sep+os.sep, os.sep).strip()
             newpath = os.path.dirname(filepath)
 
         if not os.path.exists(newpath):
diff --git a/src/calibre/ebooks/oeb/iterator.py b/src/calibre/ebooks/oeb/iterator.py
index 9b9158b37e..33cc96f08b 100644
--- a/src/calibre/ebooks/oeb/iterator.py
+++ b/src/calibre/ebooks/oeb/iterator.py
@@ -150,7 +150,8 @@ class EbookIterator(object):
         self.language = self.opf.language
         if self.language:
             self.language = self.language.lower()
-        self.spine = [SpineItem(i.path) for i in self.opf.spine]
+        self.spine = [SpineItem(i.path) for i in self.opf.spine if i.is_linear]
+        self.spine += [SpineItem(i.path) for i in self.opf.spine if not i.is_linear]
 
         cover = self.opf.cover
         if self.ebook_ext in ('lit', 'mobi', 'prc', 'opf') and cover:
diff --git a/src/calibre/gui2/device.py b/src/calibre/gui2/device.py
index 1f0b315df6..3a46352a70 100644
--- a/src/calibre/gui2/device.py
+++ b/src/calibre/gui2/device.py
@@ -812,9 +812,9 @@ class DeviceGUI(object):
             bad = '\n'.join('%s'%(i,) for i in bad)
             d = warning_dialog(self, _('No suitable formats'),
                     _('Could not upload the following books to the device, '
-                'as no suitable formats were found. Try changing the output '
-                'format in the upper right corner next to the red heart and '
-                're-converting.'), bad)
+                'as no suitable formats were found. Convert the book(s) to a '
+                'format supported by your device first.'
+                ), bad)
             d.exec_()
 
     def upload_booklists(self):
diff --git a/src/calibre/gui2/wizard/__init__.py b/src/calibre/gui2/wizard/__init__.py
index 8ebb3528d1..8610d8bba7 100644
--- a/src/calibre/gui2/wizard/__init__.py
+++ b/src/calibre/gui2/wizard/__init__.py
@@ -63,6 +63,14 @@ class Kindle(Device):
     manufacturer = 'Amazon'
     id = 'kindle'
 
+class JetBook(Device):
+
+    output_profile = 'jetbook5'
+    output_format  = 'EPUB'
+    name = 'JetBook'
+    manufacturer = 'Ectaco'
+    id = 'jetbook'
+
 class KindleDX(Kindle):
 
     output_profile = 'kindle_dx'
diff --git a/src/calibre/utils/filenames.py b/src/calibre/utils/filenames.py
index 539d2960d3..ba10d6934e 100644
--- a/src/calibre/utils/filenames.py
+++ b/src/calibre/utils/filenames.py
@@ -54,6 +54,9 @@ def shorten_components_to(length, components):
                 if r.startswith('.'): r = x[0]+r
             else:
                 r = x[:-delta]
+            r = r.strip()
+            if not r:
+                r = x.strip()[0] if x.strip() else 'x'
         ans.append(r)
     return ans