Dynamic lights on unpegged walls
In beta6.6, if a texture used on the side(s) of a lowering/raising platform features dynamic light(s), whether the line has been set to unpegged is ignored when the platform is lowering/raising (i.e the dynamic light scrolls up/down even though the texture isn't).
This is a bug that has arisen since 1.8.6 as this bug doesn't occur in that version.
I have attached an example wad showing the issue. Doom2 Map01.