--- a/src/browser/libervia_main.py	Thu Mar 19 20:41:14 2015 +0100
+++ b/src/browser/libervia_main.py	Thu Mar 19 20:41:46 2015 +0100
@@ -106,6 +106,8 @@
         #FIXME: microblog cache should be managed directly in blog module
         self.mblog_cache = []  # used to keep our own blog entries in memory, to show them in new mblog panel
 
+        self._versions={} # SàT and Libervia versions cache
+
         # self._selected_listeners = set() # FIXME: to be done with new listeners mechanism
 
     @property
@@ -133,6 +135,39 @@
             url = url[:-1]
         return url
 
+    @property
+    def sat_version(self):
+        return self._versions["sat"]
+
+    @property
+    def libervia_version(self):
+        return self._versions["libervia"]
+
+    def getVersions(self, callback=None):
+        """Ask libervia server for SàT and Libervia version and fill local cache
+
+        @param callback: method to call when both versions have been received
+        """
+        def gotVersion():
+            if len(self._versions) == 2 and callback is not None:
+                callback()
+
+        if len(self._versions) == 2:
+            # we already have versions in cache
+            gotVersion()
+            return
+
+        def gotSat(version):
+            self._versions["sat"] = version
+            gotVersion()
+
+        def gotLibervia(version):
+            self._versions["libervia"] = version
+            gotVersion()
+
+        self.bridge.getVersion(callback=gotSat)
+        self.bridge.getLiberviaVersion(callback=gotLibervia, profile=None) # XXX: bridge direct call expect a profile, even for method with no profile needed
+
     def registerSignal(self, functionName, handler=None, iface="core", with_profile=True):
         if handler is None:
             callback = getattr(self, "{}{}".format(functionName, "Handler"))

--- a/src/browser/sat_browser/json.py	Thu Mar 19 20:41:14 2015 +0100
+++ b/src/browser/sat_browser/json.py	Thu Mar 19 20:41:46 2015 +0100
@@ -186,6 +186,7 @@
                          "getEntityData", "getParamsUI", "asyncGetParamA", "setParam", "launchAction",
                          "disconnect", "chatStateComposing", "getNewAccountDomain", "confirmationAnswer",
                          "syntaxConvert", "getAccountDialogUI", "getMainResource", "getWaitingConf", "getEntitiesData",
+                         "getVersion", "getLiberviaVersion",
                         ])
     def __call__(self, *args, **kwargs):
         return LiberviaJsonProxy.__call__(self, *args, **kwargs)

--- a/src/browser/sat_browser/menu.py	Thu Mar 19 20:41:14 2015 +0100
+++ b/src/browser/sat_browser/menu.py	Thu Mar 19 20:41:46 2015 +0100
@@ -101,17 +101,23 @@
         _dialog.show()
 
     def onAbout(self):
-        _about = HTML("""<b>Libervia</b>, a Salut &agrave; Toi project<br />
-<br />
-You can contact the authors at <a href="mailto:contact@salut-a-toi.org">contact@salut-a-toi.org</a><br />
-Blog available (mainly in french) at <a href="http://www.goffi.org" target="_blank">http://www.goffi.org</a><br />
-Project page: <a href="http://salut-a-toi.org"target="_blank">http://salut-a-toi.org</a><br />
-<br />
-Any help welcome :)
-<p style='font-size:small;text-align:center'>This project is dedicated to Roger Poisson</p>
-""")
-        _dialog = dialog.GenericDialog("About", _about)
-        _dialog.show()
+        def gotVersions():
+            _about = HTML("""<b>Libervia</b>, a Salut &agrave; Toi project<br />
+    <br />
+    Libervia is a web frontend for Salut &agrave; Toi<br />
+    <span style='font-style: italic;'>S&agrave;T version:</span> {sat_version}<br/>
+    <span style='font-style: italic;'>Libervia version:</span> {libervia_version}<br/>
+    <br />
+    You can contact the authors at <a href="mailto:contact@salut-a-toi.org">contact@salut-a-toi.org</a><br />
+    Blog available (mainly in french) at <a href="http://www.goffi.org" target="_blank">http://www.goffi.org</a><br />
+    Project page: <a href="http://salut-a-toi.org"target="_blank">http://salut-a-toi.org</a><br />
+    <br />
+    Any help welcome :)
+    <p style='font-size:small;text-align:center'>This project is dedicated to Roger Poisson</p>
+    """.format(sat_version=self.host.sat_version, libervia_version=self.host.libervia_version))
+            _dialog = dialog.GenericDialog("About", _about)
+            _dialog.show()
+        self.host.getVersions(gotVersions)
 
     #Settings menu