06:50 will 

Upgrade to 2.52; this should solve some problems when mixing ac 2.13* and   am
1.5.  Ports which require 2.13/1.4 will be modified to use the ac213   and am14
ports.    

23:14 ade 

Finally nail the nasty autoconf habit of leaving ${TMPDIR}/acin.*   turds lying
around in certain circumstances.