Back to Qt 4.2, thanks Enrico.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@36236 a592a061-630c-0410-9148-cb99ea01b6c8

INSTALL

@@ -53,10 +53,10 @@ LyX makes great use of C++ Standard Template Library (STL).
 This means that gcc users will have to install the relevant libstdc++
 library to be able to compile this version of LyX. 
 
-LyX has been tested with all Qt versions since Qt 4.4.0. For compilation
-you need to compile against at least Qt 4.4.0. The only special point to
-make is that you must ensure that both LyX and the Qt libraries are
-compiled with the same C++ compiler.
+For full LyX usability we suggest to use at least Qt 4.6 which has been
+widely tested. For compilation you need to compile against at least
+Qt 4.2.2. The only special point to make is that you must ensure that both
+LyX and the Qt libraries are compiled with the same C++ compiler.
 
 Note that if Qt is using Xft2/fontconfig, you may need to install the
 latex-xft-fonts package (at ftp://ftp.lyx.org/pub/lyx/contrib/) to get

README

@@ -96,7 +96,7 @@ What do I need to compile LyX from the source distribution?
       gcc/g++, but some others work also. As of LyX 1.6.0, you need at
       least gcc 3.2.x.
 
-    * The Qt4 library, at least version 4.4.0. For all features
+    * The Qt4 library, at least version 4.2.2. For all features
       newer versions (e.g. Qt 4.6) are recommended.
 
     Read the file "INSTALL" for more information on compiling.

UPGRADING

@@ -92,7 +92,7 @@ have to update them
 Build requirements
 ------------------
 
-LyX 2.0 uses the Qt 4.x toolkit (version 4.4.0 or newer).
+LyX 2.0 uses the Qt 4.x toolkit (see INSTALL file).
 
 If you do not have the JPEG library installed, you may need to install it
 before you can use the graphics capabilities of LyX. If you do not have the