in reply to Re^2: Cursor keys with Tk::Hlist goes wrong
in thread Cursor keys with Tk::Hlist goes wrong
You can find all the code (with your suggestion) at https://sourceforge.net/projects/copyandverify/files/ver0.010_ReplByDate/ .
At the moment, the linux version has the itemcreate for col 0 commented and the add (with all attributes) active, so it works.
If you search a line with all # you find the problematic code and your suggestion (on F3).