If a tag in the Tags Filter panel is very wide, the panel becomes wide enough to contain it. As a result, the whole right panel needs to be that wide, otherwise you need to use the horizontal scrollbar. What should happen is that the Tags Editor panel's size fills the width of the whole right panel, and if the tags are too long to fit within that size then a horizontal scrollbar appears in the Tags Editor panel only. http://i.imgur.com/uISQLjs.png Reproducible: Always
Here not to reproduce with very long Tags names. When you remove the Tags, the scroll bar disappears from the panel? Maik
Correct. If you can't reproduce, maybe the tag name you set wasn't long enough if your font is small.
*** This bug has been marked as a duplicate of bug 359959 ***
Fixed with https://bugs.kde.org/show_bug.cgi?id=359959