DOOM Retro v1.6.7 has been released and may be downloaded here. This is a small point release and the changes are as follows:

• A bug has been fixed whereby DOOM Retro would crash at startup when trying to run in a screen resolution that wasn’t widescreen.
• DOOM Retro will no longer crash after successive presses of ALT + ENTER to switch between fullscreen and windowed modes.
• Ceilings that use liquid textures will now render correctly.
• An error will now be displayed at startup if a WAD file contains DeePBSP or ZDBSP nodes.
• The saturation setting in doomretro.cfg has been deprecated.
• A bug has been fixed whereby the shadows of dropped items weren’t also being mirrored when the mirrorweapons setting was true in doomretro.cfg.
• Weapons spawned at the start of a map are now also mirrored when the mirrorweapons setting was true in doomretro.cfg.
• Thanks to some excellent coding from entryway and kb1, Vanilla DOOM’s “long wall error” has been fixed.
• Further optimizations have been made to improve the overall performance and stability of DOOM RETRO.
• Teleporters in Back to Saturn X are now drawn correctly in the automap before they have been triggered.
• Whether the automap is active or not, and any automap marks, are now saved in savegames. (Note that this change breaks savegame compatibility with previous versions of DOOM Retro.)
• A header comment has been added to the top of doomretro.cfg, with a note advising to “go to http://wiki.doomretro.com for information on changing these settings”.
• The FPS counter displayed when –DEVPARM is specified on the command-line now won’t be hidden when taking a screenshot, and will continue to update when in a menu or the game is paused.
• Diminished lighting from the player has been enhanced.
• Bloodsplats are now only spawned at the same height as corpses as they slide.