diff --git a/tools/buildbot-configs/testing/unittest/CLOBBER/firefox/TRUNK/win2k3/CLOBBER b/tools/buildbot-configs/testing/unittest/CLOBBER/firefox/TRUNK/win2k3/CLOBBER
index 03df8a2d378..562dfcb6eb9 100644
--- a/tools/buildbot-configs/testing/unittest/CLOBBER/firefox/TRUNK/win2k3/CLOBBER
+++ b/tools/buildbot-configs/testing/unittest/CLOBBER/firefox/TRUNK/win2k3/CLOBBER
@@ -1 +1 @@
-Clobber for bug 415928 jemalloc packaging fix.
+Clobber for igor's bug 420904 redness (coincidental timing)