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I found that after upgraded from the old -dev to 3.0-alpha, my slideshow's does not show the pager correctly anymore.
Previously, the banner has the pager ("1 2 3 4...") with the active pager item highlighted by CSS class ".active". But after the upgrade the ".active" is no longer there. And at the Views' "Style Setting"-> "Style" -> "Slideshow -- > the gear button", no mater how I set at the "Pager" option, the setting gone after updated and saved the Views (all blank when I come back).