Repetitive fade-out in Strife ending

Strife features three different ending sequences, and after the conclusion of each, the Rogue Entertainment credits screen is displayed while the D_FAST music is played.

In versions of the game up to 1.2, the game will repeatedly perform a crossfade screen melt while sitting at this screen. However, due to the Doom engine's use of a "dirty rectangles" refresh scheme, this will only be visible if the menu system is currently active. While the menus are up, the screen wipe effect can be observed to occur with a frequency of 19 seconds.

This problem is the only known bug that was repaired between v1.2 and v1.31 of Strife.