SM 1101 on Win10 x64
In the Blame history the commit column is too narrow and when line number with more then 3 digits are shown they overlap into each other making the line number unreadable. (sorry, didn't know how to attach screenshot!)
There are no draggable handles to change columns widths.
It would be reasonable to account enough space for up to 5 digits in line numbers, just to be sure to cover very long source files (>= 10000 line numbers) — but 4 digits should be the minimum requirements.