When start_frame given the filmstrip is out of position

[klaasklaas]

When i give a start_frame (e.g 10) the 10th photo is displayed, only the filmstrip position is the same as if start_frame is not given. The right photo is highlighted, but not always in the visible part of the filmstrip.
When clicking on a photo in the filmstrip, the correct photo is displayed, but the filmstrip scrolls to the wrong position (i think it is something like correct position + start_frame)
When autoplay is set as well, the filmstrip scrolls one at a time, just as it should, but it starts at the wrong position.