Inverted icon

The "Select all local/remote files (Ctrl+A)" icons appear to be inverted. Unless of course this is some arcane nod to Talking Heads' 1980 album with the same letter style on the jacket (which would be more like a feature than a bug :D )

Using WinSCP ver. 5.5.4 (build 4433) on Windows 8.1

I assume you mean the "Turned A" symbol. It reads "for all". It comes from predicate logic and is a symbol for "universal quantification".
See https://en.wikipedia.org/wiki/List_of_logic_symbols

Ahh, good to know. Knew a few basic logic symbols but not that one (the link helped). "New trick learned." -Old Dog

-C