After several incidents on the old HKK IGS involving American heavy metal in LNAV finals with map shift and then real GS capture showing parallel off localiser descents towards the little hills, all saved by the alert radar chaps our 767 procedures were changed.
From a trust the new technology, do not resist progress or else, it became overnight do not trust it at all!!
We were now instructed to always intercept the localiser in heading with loc armed and when loc captured, only then arm the approach.
FMC map shift was a problem in Africa DAR,Central India, and Manilla on our routes and it was not always possible to actually do a raw data backup check either.