no backwards compatibility (yet)
diff --git a/README.md b/README.md
index 54b772f..fb770cd 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,4 @@
A harder, better, faster and stronger spiritual successor to BZip2. Features higher compression ratios and better performance thanks to a order-2 context mixing entropy coder and fast Burrows-Wheeler transform code making use of suffix arrays.
-Work-In-Progress.
+Work-In-Progress. For the time being, don't expect the trunk to be compatible with previous commits.
