Timing reported by summary() seems to be wrong

frontend elapsed time: 0.7429769 secs
backend elapsed time: 2.985495 mins
looks ok but in fact I system.time'd the run and it reported:

> system.time(multivTwinSatFit<-mxRun(multivTwinSatModel))
Running multivTwinSat
user system elapsed
177.301 0.608 179.884

so there are some 175 seconds missing from the tally.

Also, the results from a run with @independent=T under snowfall are different and seem to be basically reporting zero seconds for backend elapsed time.