--- a/RELEASE_NOTES	Sat Feb 28 15:16:47 2015 +0100
+++ b/RELEASE_NOTES	Sat Feb 28 18:20:46 2015 +0100
@@ -21,9 +21,13 @@
 
 New user-visible features
 -------------------------
+- (network) CalculateTxTime has been declared obsolete.
+  CalculateBytesTxTime and CalculateBitsTxTime are to be used instead.
+  The reurn value is a Time, instead of a double.
 
 Bugs fixed
 ----------
+- Bug 1974 - CalculateTxTime should return a Time, not a double
 - Bug 2073 - NDisc cache entries update timer might be stuck in a loop
 
 Known issues