When I click on a column heading, I expect the list of songs to be sorted by that column. Instead, nothing happens. Using KDE 4.12.5 and Qt 4.8.5 Reproducible: Always
Confirmed on Kubuntu 14.04 LTS, using KDE 4.13.3.
Sadly, I had to abandon juk for quodlibet due to the missing feature.
It seems sorting by column works inside "Collection List" but not inside "Play Queue", for example. I'm using JuK 18.12.2 on a Gentoo Linux system.
Works for me on Manjaro, juk 18.12.2, with the exception of sorting by Track when filtering for a string. I've filed a separate bug for this.