diff -r 2cca6dc0bb4b -r 309289285f0c sbsv2/raptor/RELEASE-NOTES.txt
--- a/sbsv2/raptor/RELEASE-NOTES.txt	Fri Feb 05 13:22:21 2010 +0000
+++ b/sbsv2/raptor/RELEASE-NOTES.txt	Sat Feb 06 22:42:29 2010 +0000
@@ -4,7 +4,7 @@
 
 Defect Fixes:
 - SF Bug 1569 - excessive recompilation in incremental tracecompiler builds
-
+- Better error messages for make-engine selection.  e.g. "sbs -e arm" will now produce a useful error message rather than a traceback. "arm" is a real variant but it's not a make engine.  In the past sbs would have tried to use it and would have failed with a complicated traceback. Also doesn't traceback for non-existent make engines.
 
 version 2.12.1