Using runs 1193, 1194 and 1200, I calibrated the VDC TDC offsets using the tools in ~adaq/apex/vdc. The updated database is in $DB_DIR/20100626/db_L.vdc.dat.Yi.tdccalib. I aliased this file to db_L.vdc.dat, so future replay will pick it up.
Note: the section "TTD lookup table" in the VDC database is obsolete and can be safely deleted.