Added a !+1s delay in preob before mk5=dot? as recommended by Dan Smythe. Done on /usr2/proc/hb12m.prc, also corresponding files on pcfske, pcfsyg.
The 'dot?' query in 'preob' is off by more than 0.5 second, probably because of delays caused by network traffic. Suggest deleting the 'dot?' query from 'preob', or at least putting a '!+1s' delay in 'preob' before the 'mk5=dot?' query.