diff -urN a/src/mesa/drivers/dri/r200/r200_blit.c b/src/mesa/drivers/dri/r200/r200_blit.c
--- a/src/mesa/drivers/dri/r200/r200_blit.c	2012-03-22 17:10:07.000000000 +0000
+++ b/src/mesa/drivers/dri/r200/r200_blit.c	2012-06-05 00:43:25.664866221 +0100
@@ -486,6 +486,9 @@
     if (!r200_check_blit(dst_mesaformat, dst_pitch))
         return GL_FALSE;
 
+    if ((src_width == 2048) || (src_height == 2048))
+        WARN_ONCE ("Source width and/or height = 2048 which may cause graphical glitches.\n");
+
     /* Make sure that colorbuffer has even width - hw limitation */
     if (dst_pitch % 2 > 0)
         ++dst_pitch;