Got this one from IRC this morning.. In order to recache single tiles in TC, as long as it is not metatile (metatile=false), then we can simply append “FORCE=1″ in the URL..

http://192.168.2.14/tilecache/tilecache.py?FORCE=1&LAYERS=beijing_900913_wide_en&MAP=%2Fmyhome%2Fmap%2Fbeijing%2Fnew%2Fbeijing_900913_wide_en%2Fbeijing.map&FORMAT=jpg&TRANSPARENT=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=12951949.03168994,4852222.893873828,12952101.905746482,4852375.767930372&WIDTH=256&HEIGHT=256

Picture 2.png

Well for completeness, I gave my ofcmate a DELETE tool which wipes out everything in the /tilecache/map_dir directory..