Version: (using KDE 4.0.98) Installed from: Ubuntu Packages To select/ limit to a time frame, you have to know to press the mouse button down _on the time scale_, not on the boxes/tiles of the time bar. I think this is not that easy for a new user to find and learn. I suggest that the selections would be done by selecting the tiles, not the date text. Though this also affects the 'jump to date' -feature, there need's to be some button/something for that as well. Maybe sliders that define the start and end area, something similar to video editors, see http://wisdom-soft.com/images/asr/asr_editor_dlg_85.jpg
This also closely involves the positioning of the 'Widen selections to include all images and videos again' -button. At the moment it's on the bottom left of the date widget when all other buttons (go back a resolution unit (=day, week, month etc..)/go forward a resolution block, zoom in , zoom out) are on the right. The reset button is difficult to find. If the reason it's there is that some space was tried to be saved, it could be moved at least below the date bar but on the right end, next to the other buttons. and btw. the next/previous unit buttons have arrows up and down, not right/left