diff --git a/plugins/calendar/README b/plugins/calendar/README
index 78c84a96..758fb1bb 100644
--- a/plugins/calendar/README
+++ b/plugins/calendar/README
@@ -1,72 +1,78 @@
 A calendar module for Roundcube
 -------------------------------
 
 This plugin currently supports a local database as well as a Kolab groupware
 server as backends for calendar and event storage. For both drivers, some
 initialization of the local database is necessary. To do so, execute the
 SQL commands in drivers/<yourchoice>/SQL/<yourdatabase>.initial.sql
 
 For some general calendar-based operations such as alarms handling or iCal
 parsing/exporting and UI widgets/style this plugins requires the `libcalendaring`
 and `libkolab` plugins which are also part of the Kolab Roundcube Plugins repository.
 Make sure these plugins are installed and configured correctly.
 
 For recurring event computation, some utility classes from the Horde project
 are used. They are packaged in a slightly modified version with this plugin.
 
 
 REQUIREMENTS
 ------------
 
 Some functions are shared with other plugins and therefore being moved to
 library plugins. Thus in order to run the calendar plugin, you also need the
 following plugins installed:
 
 * libcalendaring [1]
 * libkolab [1]
 
 
 INSTALLATION
 ------------
 
 For a manual installation of the calendar plugin (and its dependencies),
 execute the following steps. This will set it up with the database backend
 driver.
 
 1. Get the source from git
 
   $ cd /tmp
   $ git clone https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git
   $ cd /<path-to-roundcube>/plugins
   $ cp -r /tmp/roundcubemail-plugins-kolab/plugins/calendar .
   $ cp -r /tmp/roundcubemail-plugins-kolab/plugins/libcalendaring .
   $ cp -r /tmp/roundcubemail-plugins-kolab/plugins/libkolab .
 
 2. Create calendar plugin configuration
 
   $ cd calendar/
   $ cp config.inc.php.dist config.inc.php
   $ edit config.inc.php
 
 3. Initialize the calendar database tables
 
   $ cd ../../
   $ bin/initdb.sh --dir=plugins/calendar/drivers/database/SQL
 
 4. Build css styles for the Elastic skin
 
   $ lessc --relative-urls -x plugins/libkolab/skins/elastic/libkolab.less > plugins/libkolab/skins/elastic/libkolab.min.css
 
 5. Enable the calendar plugin
 
   $ edit config/config.inc.php
 
 Add 'calendar' to the list of active plugins:
 
   $config['plugins'] = array(
     (...)
     'calendar',
   );
 
 
+IMPORTANT
+---------
+
+This plugin doesn't work with the classic skin of Roundcube because no
+templates are available for that skin.
+
 [1] https://git.kolab.org/diffusion/RPK/
diff --git a/plugins/libkolab/README b/plugins/libkolab/README
index 2f948390..e30ab030 100644
--- a/plugins/libkolab/README
+++ b/plugins/libkolab/README
@@ -1,28 +1,37 @@
 libkolab plugin to access to Kolab groupware data
 =================================================
 
 The contained library classes establish a connection to the Kolab server
 and manage the access to the Kolab groupware objects stored in various
 IMAP folders. For reading and writing these objects, the PHP bindings of
 the libkolabxml library are used.
 
+This plugin also provides elastic/larry skin support for Kolab plugins.
+
 
 REQUIREMENTS
 ------------
 * libkolabxml PHP bindings
   - kolabformat.so loaded into PHP
   - kolabformat.php placed somewhere in the include_path
 * PEAR: HTTP/Request2
 * PEAR: Net/URL2
 
 
 INSTALLATION
 ------------
 To use local cache you need to create a dedicated table in Roundcube's database.
 To do so, execute the SQL commands in SQL/<yourdatabase>.initial.sql
 
 
 CONFIGURATION
 -------------
 Rename config.inc.php.dist to config.inc.php in the plugin folder.
 For available configuration options see config.inc.php.dist file.
+
+
+IMPORTANT
+---------
+
+This plugin doesn't work with the classic skin of Roundcube because no
+templates are available for that skin.
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