Preserving directory times on mirrors created with wget

General question about mirroring with wget that has been driving me crazy for a couple of days. My mirror of bitsavers is maintained using wget to my local work machine. Over the break, I switched to 10.5 of OS X, and got the latest darwin port of wget. In the version I had been running, directory dates were maintained drwxr-xr-x 9 aek staff 264 Nov 23 2006 . drwxr-xr-x 380 aek staff 12876 Jan 3 09:02 .. -rw-r--r-- 1 aek staff 479 Dec 19 10:54 .listing -rw-r--r-- 1 aek staff 3835317 Mar 3 2004 M-4660_IOU-40_Jun79.pdf -rw-r--r-- 1 aek staff 8160815 Mar 3 2004 M-4908_Q30cpuTech_1983.pdf note the directory date is Nov 2006 even though the .listing was from 2008 using the same command (wget -m -np ftp://...) I now get drwxrwxr-x 2 pdp1 pdp1 4096 Jan 7 11:41 . drwxrwxr-x 3 pdp1 pdp1 4096 Jan 7 11:37 .. -rw-rw-r-- 1 pdp1 pdp1 479 Jan 7 11:37 .listing -rw-rw-r-- 1 pdp1 pdp1 3835317 Mar 3 2004 M-4660_IOU-40_Jun79.pdf -rw-rw-r-- 1 pdp1 pdp1 8160815 Mar 3 2004 M-4908_Q30cpuTech_1983.pdf I remember having a hell of a time finding a version that had the correct directory behavior, and now I've forgotten what I had done to get it to work. Anyone recognize this?