Cookbook: future FAQ for linux binary package

Documentation/Cookbook/rst/Installation.rst

@@ -109,6 +109,42 @@ Notes:
 
 - Multiple installation of OTB can exists in same system without one conflicting the other!
 
+FAQ for Packaging
+-----------------
+
+Q: I am getting an error message...
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+::
+
+   Cannot mix incompatible Qt library (version 0x40806) with this library (version 0x40807)
+   Aborted
+
+A: This is due to a conflict with system Qt4 (usually seen on KDE) and Qt4 + gtk libs in OTB package. The fix you need is to remove those libs from package.
+
+.. parsed-literal::
+
+   cd /path/to/OTB-|release|-Linux64
+   rm -f lib/libQt* && rm -fr lib/gtk
+
+Q: Monteverdi and Mapla applications look different from my other applications.
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A: By default, Monteverdi, Mapla and otbapplication (otbgui\_\*) uses a default gtk theme (plastic)
+which is distributed with the OTB package!.  We do this to be on safe side, like when a user does
+not have gtk libraries installed when using our package.
+
+gtk libraries in the package is  the reason why you are getting a default "plastic" look & feel that
+makes it look different from other GUI applications.
+To get same look and feel, you can "force"  Monteverdi and Mapla to use system GTK.
+
+::
+
+   export OTB_USE_SYSTEM_GTK=1
+
+And now start ``monteverdi.sh`` or ``mapla.sh`` from OTB-|release|-Linux64
+To get back default behaviour, unset OTB_USE_SYSTEM_GTK=1 or set OTB_USE_SYSTEM_GTK=0
+
+
 MacOS X
 -------