xnview wrote:Could you try XnViewMP 0.26
It works now

Really great.
But there's one more bug with the preview panel: When I attach, and then detach it (f.e. over context menu at the menu bar), it's not able to get docked out anymore. When it get attached, after it got attached and detached, it's getting hided till XnViewMP get's restarted.
1.: Preview panel is fully movable
2.: Attaching preview panel: It gets attached to info panel correctly.
3.: Detaching preview panel: It gets docked to bottom automatically
4.: Preview panel is not able to get docked out anymore
5.: Attaching preview panel 2nd time: It disappears.
6.: Restarting XnViewMP: Preview panel is back again in info panel.
When the preview panel is attached to info panel, no preview is shown when a video file is selected (edit: Oh, it seems the whole info panel doesn't work for videos). But the sound of videos get played. The sound still gets played, when the preview pane is closed completely (I think it shouldn't?)
If you have too much time, I would like to request to get able to dock out "Categories", "Properties", ... from the info panel too.