no need for those previous-index-h/v values any more: they were only used in an older attempt to cut down the number of visible backgrounds during transitions. PRevious edit fixes that finally.
no need for those previous-index-h/v values any more: they were only used in an older attempt to cut down the number of visible backgrounds during transitions. PRevious edit fixes that finally.

GerHobbelt/reveal.js,GerHobbelt/reveal.js,GerHobbelt/reveal.js