diff --git a/bumplibs.sh b/bumplibs.sh
index 3b8007ee97..68f2f586fb 100755
--- a/bumplibs.sh
+++ b/bumplibs.sh
@@ -1,100 +1,112 @@
 #!/bin/bash
 
 declare -A headers
 headers[crmcommon]="include/crm/common include/crm/crm.h"
 headers[crmcluster]="include/crm/cluster.h"
 headers[transitioner]="include/crm/transition.h"
 headers[cib]="include/crm/cib.h include/crm/cib/util.h"
 headers[pe_rules]="include/crm/pengine/rules.h"
 headers[pe_status]="include/crm/pengine/common.h  include/crm/pengine/complex.h  include/crm/pengine/rules.h  include/crm/pengine/status.h"
 headers[pengine]="include/crm/pengine/common.h  include/crm/pengine/complex.h  include/crm/pengine/rules.h  include/crm/pengine/status.h"
 headers[stonithd]="include/crm/stonith-ng.h"
 headers[lrmd]="include/crm/lrmd.h"
 
 LAST_RELEASE=`test -e /Volumes || git tag -l | grep Pacemaker | grep -v rc | sort -Vr | head -n 1`
 for lib in crmcommon crmcluster transitioner cib pe_rules pe_status stonithd pengine lrmd; do
     git diff -w $LAST_RELEASE..HEAD ${headers[$lib]}
     echo ""
 
     am=`find . -name Makefile.am -exec grep -lr "lib${lib}_la.*version-info" \{\} \;`
     am_dir=`dirname $am`
 
     if
 	grep "lib${lib}_la_SOURCES.*\\\\" $am
     then
 	echo -e "\033[1;35m -- Sources list for lib$lib is probably truncated! --\033[0m"
 	echo ""
     fi
 
     sources=`grep "lib${lib}_la_SOURCES" $am | sed s/.*=// | sed 's:$(top_builddir)/::' | sed 's:$(top_srcdir)/::' | sed 's:\\\::' | sed 's:$(libpe_rules_la_SOURCES):rules.c\ common.c:'`
     full_sources=""
     for f in $sources; do
 	if
 	    echo $f | grep -q "/"
 	then
 	    full_sources="$full_sources $f"
 	else
 	    full_sources="$full_sources $am_dir/$f"
 	fi
     done
 
     lines=`git diff -w $LAST_RELEASE..HEAD ${headers[$lib]} $full_sources | wc -l`
 
     if [ $lines -gt 0 ]; then
 	echo "- Headers: ${headers[$lib]}"
 	echo "- Sources: $full_sources"
 	echo "- Changed Sources since $LAST_RELEASE:"
 	git diff -w $LAST_RELEASE..HEAD --stat $full_sources
 	echo ""
-	read -p "Are the changes to lib$lib: [a]dditions, [r]emovals or [f]ixes? [None]: " CHANGE
+	echo "New arguments to functions or changes to the middle of structs are incompatible additions"
+	echo ""
+	read -p "Are the changes to lib$lib: [a]dditions, [i]ncompatible additions, [r]emovals or [f]ixes? [None]: " CHANGE
 
 	git show $LAST_RELEASE:$am | grep version-info
 	VER=`git show $LAST_RELEASE:$am | grep "lib.*${lib}_la.*version-info" | sed s/.*version-info// | awk '{print $1}'`
 	VER_NOW=`grep "lib.*${lib}_la.*version-info" $am | sed s/.*version-info// | awk '{print $1}'`
 	VER_1=`echo $VER | awk -F: '{print $1}'`
 	VER_2=`echo $VER | awk -F: '{print $2}'`
 	VER_3=`echo $VER | awk -F: '{print $3}'`
 	VER_1_NOW=`echo $VER_NOW | awk -F: '{print $1}'`
 
 	case $CHANGE in
-	    A|a)
+	    i|I)
+		echo "New version with incompatible extensions: x+1:0:0"
+		VER_1=`expr $VER_1 + 1`
+		VER_2=0
+		VER_3=0
+		for h in ${headers[$lib]}; do
+		    sed -i.sed  "s/lib${lib}.so.${VER_1_NOW}/lib${lib}.so.${VER_1}/" $h
+		done
+		;;
+	    a|A)
 		echo "New version with backwards compatible extensions: x+1:0:z+1"
 		VER_1=`expr $VER_1 + 1`
 		VER_2=0
 		VER_3=`expr $VER_3 + 1`
 		;;
 	    R|r)
 		echo "New backwards incompatible version: x+1:0:0"
 		VER_1=`expr $VER_1 + 1`
 		VER_2=0
 		VER_3=0
 		for h in ${headers[$lib]}; do
 		    sed -i.sed  "s/lib${lib}.so.${VER_1_NOW}/lib${lib}.so.${VER_1}/" $h
 		done
 		;;
 	    F|f)
 		echo "Bugfix: x:y+1:z"
 		VER_2=`expr $VER_2 + 1`
 		;;
 	esac
 	VER_NEW=$VER_1:$VER_2:$VER_3
 
 	if [ ! -z $CHANGE ]; then
 	    if [ $VER_NEW != $VER_NOW ]; then
 		echo "Updating $lib library version: $VER -> $VER_NEW"
 		sed -i.sed  "s/version-info\ $VER_NOW/version-info\ $VER_NEW/" $am
 	    else
 		echo "No further version changes needed"
+		sed -i.sed  "s/version-info\ $VER_NOW/version-info\ $VER_NEW/" $am
 	    fi
 	else
 	    echo "Skipping $lib version"
 	fi
     else
 	echo "No changes to $lib interface"
     fi
 
     read -p "Continue?"
     echo ""
 done
 
 git diff -w