[gtk+] Add a note about text view issues

[Matthias Clasen <matthiasc src gnome org>]

commit 629189968180cb59a5dbcc5f6f91b0ba1c8af2ef
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Oct 9 18:11:18 2014 -0400

    Add a note about text view issues
    
    Mention text view background problems and the draw_layer
    vfunc in the release notes.

 README.in |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/README.in b/README.in
index 9500024..4bf6d65 100644
--- a/README.in
+++ b/README.in
@@ -99,6 +99,14 @@ Release notes for 3.14
   to be problematic. This combination is using code paths in cairo and
   graphics drivers which are rarely tested and likely buggy.
 
+* GtkTextView is now using a pixel-cache internally, and is drawing
+  a background underneath the text. This can cause problems for applications
+  which assumed that they could draw things below and above the text
+  by chaining up in the ::draw implementation of their GtkTextView subclass.
+  As a short-term workaround, you can make the application apply a
+  custom theme to the text view with a transparent background. For
+  a proper fix, use the new ::draw_layer vfunc.
+
 Release notes for 3.12
 ======================