Helo, i have noticed that some menu icons are off by 1 px. They are all special icons (landscaping, map editing, special construction, lists,...). Found that gui/gui64/menu_buttons.png was completely 1 px off the 64x64 grid. Perhaps an unfortunate click in gimp with the move-layer tool did that.
Further all rail electrification icons and most canal (except barge canal) were also off by 1 px. There it was much harder to guess if only the icon or whole image was misaligned. After looking at the images I decided that the canals and 3/4th rail deserve moving the whole picture, while AC/DC catenary is OK, and only the icon needs realignment.
There is still a problem with mixed AC/DC+3rd rail: the 3rd rail is in different place in these - see the attached picture. It may be easy to fix if you still have a layered xcf laying around with separate layers for overhead and 3rd rail.
Also there are some misaligments on diagonal canals and canal tunnels, I did not try to fix now.
Fixed images are here: https://uran.webstep.net/~vladki/simutrans/pak128.Britain/