Index: head/usr.sbin/bsdinstall/scripts/checksum
===================================================================
--- head/usr.sbin/bsdinstall/scripts/checksum
+++ head/usr.sbin/bsdinstall/scripts/checksum
@@ -62,8 +62,16 @@
 		percentage=$(echo $percentage + 100/`echo $DISTRIBUTIONS | wc -w` | bc)
 	else
 		eval "status_$distname=1"
-		dialog --backtitle "FreeBSD Installer" --title "Error" \
-		    --msgbox "The checksum for $dist does not match. It may have become corrupted, and should be redownloaded." 0 0
+		case $(/bin/freebsd-version -u) in
+		*-ALPHA*|*-CURRENT|*-STABLE|*-PRERELEASE)
+			dialog --backtitle "FreeBSD Installer" --title "Error" \
+			    --msgbox "The checksum for $dist does not match. It may have become corrupted, or it may be from a newer version of FreeBSD. Please check for a newer snapshot." 0 0
+			;;
+		*)
+			dialog --backtitle "FreeBSD Installer" --title "Error" \
+			    --msgbox "The checksum for $dist does not match. It may have become corrupted, and should be redownloaded." 0 0
+			;;
+		esac
 		exit 1
 	fi
 done