diff --git a/src/calibre/translations/cs.po b/src/calibre/translations/cs.po
index 267a605378..2d55cf9702 100644
--- a/src/calibre/translations/cs.po
+++ b/src/calibre/translations/cs.po
@@ -8,15 +8,15 @@ msgstr ""
 "Project-Id-Version: calibre\n"
 "Report-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>\n"
 "POT-Creation-Date: 2013-04-12 05:42+0000\n"
-"PO-Revision-Date: 2013-04-11 10:45+0000\n"
-"Last-Translator: Kovid Goyal <Unknown>\n"
+"PO-Revision-Date: 2013-04-18 13:06+0000\n"
+"Last-Translator: Jakub Jelínek <Unknown>\n"
 "Language-Team: Czech <cs@li.org>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;\n"
-"X-Launchpad-Export-Date: 2013-04-13 05:14+0000\n"
-"X-Generator: Launchpad (build 16564)\n"
+"X-Launchpad-Export-Date: 2013-04-19 05:14+0000\n"
+"X-Generator: Launchpad (build 16567)\n"
 
 #: /home/kovid/work/calibre/src/calibre/customize/__init__.py:56
 msgid "Does absolutely nothing"
@@ -354,7 +354,7 @@ msgstr ""
 #: /home/kovid/work/calibre/src/calibre/customize/builtins.py:797
 #: /home/kovid/work/calibre/src/calibre/gui2/actions/toc_edit.py:63
 msgid "Edit the Table of Contents in your books"
-msgstr ""
+msgstr "Upravit obsah v knihách"
 
 #: /home/kovid/work/calibre/src/calibre/customize/builtins.py:802
 msgid "Delete books from your calibre library or connected device"
@@ -912,7 +912,7 @@ msgstr "Tento profil je určen pro zařízení řady PocketBook Pro 900."
 #: /home/kovid/work/calibre/src/calibre/customize/profiles.py:785
 msgid ""
 "This profile is intended for the PocketBook Pro 912 series of devices."
-msgstr ""
+msgstr "Tento profil je určen pro zařízení ze série PocketBook Pro 912."
 
 #: /home/kovid/work/calibre/src/calibre/customize/ui.py:30
 msgid "Installed plugins"
@@ -1119,7 +1119,7 @@ msgstr "prázdný"
 #: /home/kovid/work/calibre/src/calibre/db/search.py:323
 #: /home/kovid/work/calibre/src/calibre/library/caches.py:591
 msgid "Invalid boolean query \"{0}\""
-msgstr ""
+msgstr "Neplatný boolean dotaz \"{0}\""
 
 #: /home/kovid/work/calibre/src/calibre/debug.py:75
 #: /home/kovid/work/calibre/src/calibre/gui2/main.py:47
@@ -1144,7 +1144,7 @@ msgstr "Protokol ladění"
 #: /home/kovid/work/calibre/src/calibre/debug.py:272
 #, python-format
 msgid "No plugin named %s found"
-msgstr ""
+msgstr "Plugin se jménem %s nebyl nalezen."
 
 #: /home/kovid/work/calibre/src/calibre/devices/android/driver.py:19
 msgid "Communicate with Android phones."
@@ -1921,6 +1921,8 @@ msgid ""
 "When uploading covers, do not change the aspect ratio when resizing for the "
 "device. This is for firmware versions 2.3.1 and later."
 msgstr ""
+"Během nahrávání obálek neměnit při změně velikosti poměr stran. (Pro "
+"firmware v. 2.3.1 a novější)"
 
 #: /home/kovid/work/calibre/src/calibre/devices/kobo/driver.py:1241
 msgid ""
@@ -1952,7 +1954,7 @@ msgstr ""
 
 #: /home/kovid/work/calibre/src/calibre/devices/kobo/driver.py:1256
 msgid "Title to test when debugging"
-msgstr ""
+msgstr "Titul pro vyzkoušení během ladění"
 
 #: /home/kovid/work/calibre/src/calibre/devices/kobo/driver.py:1257
 msgid ""
@@ -2118,7 +2120,7 @@ msgstr "Nalezen objekt: %s"
 
 #: /home/kovid/work/calibre/src/calibre/devices/mtp/windows/driver.py:61
 msgid "MTP devices are not supported on Windows XP"
-msgstr ""
+msgstr "MTP zařízení nejou na Windows XP podporována"
 
 #: /home/kovid/work/calibre/src/calibre/devices/mtp/windows/driver.py:69
 msgid ""