diff --git a/src/calibre/ebooks/oeb/base.py b/src/calibre/ebooks/oeb/base.py
index 96140ce195..753b1722de 100644
--- a/src/calibre/ebooks/oeb/base.py
+++ b/src/calibre/ebooks/oeb/base.py
@@ -421,16 +421,16 @@ class DirContainer(object):
             return f.read()
 
     def write(self, path, data):
-        path = os.path.join(self.rootdir, path)
+        path = os.path.join(self.rootdir, urlunquote(path))
         dir = os.path.dirname(path)
         if not os.path.isdir(dir):
             os.makedirs(dir)
-        with open(urlunquote(path), 'wb') as f:
+        with open(path, 'wb') as f:
             return f.write(data)
 
     def exists(self, path):
-        path = os.path.join(self.rootdir, path)
-        return os.path.isfile(urlunquote(path))
+        path = os.path.join(self.rootdir, urlunquote(path))
+        return os.path.isfile(path)
 
     def namelist(self):
         names = []
diff --git a/src/calibre/ebooks/oeb/writer.py b/src/calibre/ebooks/oeb/writer.py
index 9c7c1af48d..25365991d0 100644
--- a/src/calibre/ebooks/oeb/writer.py
+++ b/src/calibre/ebooks/oeb/writer.py
@@ -62,6 +62,7 @@ class OEBWriter(object):
         output = DirContainer(path, oeb.log)
         for item in oeb.manifest.values():
             output.write(item.href, str(item))
+
         if version == 1:
             metadata = oeb.to_opf1()
         elif version == 2:
diff --git a/src/calibre/translations/sv.po b/src/calibre/translations/sv.po
index 13b37d9401..d072ec9d14 100644
--- a/src/calibre/translations/sv.po
+++ b/src/calibre/translations/sv.po
@@ -2245,7 +2245,7 @@ msgstr ""
 "kommando ...\n"
 "\n"
 "Kommandot kan vara något av följande:\n"
-"[%% kommandon]\n"
+"[%%commands]\n"
 "\n"
 "Använd %prog kommando --help för att få mer information om ett visst "
 "kommando\n"
@@ -6213,7 +6213,7 @@ msgstr "<p> För hjälp se: <a href=\"%s\"> Användarhandbok </ a> <br>"
 #: /home/kovid/work/calibre/src/calibre/gui2/ui.py:224
 msgid "<b>%s</b>: %s by <b>Kovid Goyal %%(version)s</b><br>%%(device)s</p>"
 msgstr ""
-"<b>%s </ b>:%s av <b> Kovid Goyal%% (version) s </ b> <br>%% (enhet) s </ p>"
+"<b>%s </ b>:%s av <b> Kovid Goyal %%(version)s </ b> <br>%%(device)s </ p>"
 
 #: /home/kovid/work/calibre/src/calibre/gui2/ui.py:247
 msgid "Edit metadata individually"
@@ -7826,9 +7826,9 @@ msgid ""
 "\n"
 "For help on an individual command: %%prog command --help\n"
 msgstr ""
-"%% prog kommando [alternativ] [argument]\n"
+"%%prog kommando [alternativ] [argument]\n"
 "\n"
-"%% PROG är kommandoradsgränssnitt till calibres bokdatabasen.\n"
+"%%prog är kommandoradsgränssnitt till calibres bokdatabasen.\n"
 "\n"
 "kommando är en av:\n"
 "  %s\n"