--- rxvt-unicode/README.configure	2010/10/15 21:30:51	1.67
+++ rxvt-unicode/README.configure	2010/12/09 10:36:52	1.69
@@ -124,8 +124,10 @@
         BMP, ICO and TGA.
 
     --enable-transparency (default: on)
-        Add support for backgrounds, creating illusion of transparency in
-        the term.
+        Add support for using the root pixmap as background to simulate
+        transparency. Note that blur and blend effects depend on
+        libAfterImage or on libXrender and on the availability of the RENDER
+        extension in the X server.
 
     --enable-fading (default: on)
         Add support for fading the text when focus is lost.
@@ -179,6 +181,7 @@
           compile in built-in block graphics
           skip builtin block graphics (-sbg)
           separate highlight colour (-highlightColor, -highlightTextColor)
+          extended mouse reporting modes (1005 and 1015).
 
         It also enables some non-essential features otherwise disabled, such
         as: