Berserk and Natural Resist’s skill icons have been erroneously mixed up since 1.00 of original D2, they should be swapped with each other so that they fit with the other skill icons.
How it currently looks:
How it should look after being swapped:
I wouldn’t mind seeing this fixed in 2.6, there’s definitely more important issues like the 8 KB save file size limit that hasn’t been addressed but this would only take about 10 seconds to fix.
This can be fixed by going to skilldesc.txt and changing Berserk’s “IconCel” column to 54 and Natural Resistance’s “IconCel” to 52 (which is swapping them, Berserk has 52 and NR has 54 currently).