Doing a Preventative Maintenance inspection myself (rather than having a dealer do it, as in past), I found this seepage-leakage (glistening brown area) above and slightly forward of the point where the drive shaft is joined to the differential. Dark area in foreground of pix is seepage on differential bottom. Car has 104,200 miles; featured in July 2007 Roundel (Washington DC to Alaska and back). Oil level seems OK (dribbles out when filler bolt loosened), but I would welcome any advice on whether this is a sign of something to be repaired, replaced, ignored, whatever...click on any image to enlarge it...Many thanks...