I didn't go looking for this - I encountered it when searching for a payee.

My screen width is 1920px. With the Payees view window at full width, the Transactions tab window is about half that.  The Date, Payment and Deposit columns are about the same width, but the Deposit column is empty, the Date column is half empty and the Payment column is about 60% empty.  No problem at this stage, but I don't operate with this window size.
If I reduce the KMM window size to a more typical 1000 - 1100px, the Date, Payee and Deposit columns have retained their previous width and emptyness.  The Details column has disappeared, and the Account column shows about five characters.
Shrinking now to 800-900px, the Payment and Deposit columns are untouched, the Details and Account columns have disappeared and the Date column is now reducing.
Shrinking further, and just before a horizontal scroll bar appears, the Date and Account column are the only shows, both with much empty space.  When the scroll-bar appears, the Date and Account columns are showing, clicking in the empty scroll-bar region produces an empty window, and a final click to the right shows the Date and Account columns again for some reason.  The other columns are nowhere to be seen.



Reproducible: Always

Steps to Reproduce:
As above.
Actual Results:  
Weird!  As above.

Expected Results:  
Allocate column widths according to their content, with spare width going to the details column.  Allow all columns to reduce to a minimum, rather that exhibiting flagrant favouritism.
Scrolling should give sensible results.