Hi! I maintain mlb-led-scoreboard which leverages this library.

We have had an issue reported where users noticed some strange alignment issues for some characters.
MLB-LED-Scoreboard/mlb-led-scoreboard#416 (comment)

Our default font is tom-thumb.bdf. Any glyphs which specify an X offset in their BBX field will be left-aligned instead of correctly aligned by the bounding box. An example character is !, where BBX 1 5 1 0 uses the third column to set a X-offset of +1.

Picture of some other characters (!, i, :, . are affected, x for reference spacing):

I was able to trace it down to 39953b7. Our previous advice to end users was to revert back to a56338d, but that commit is over a year old at this point.