http://forum.zdoom.org/viewtopic.php?f=19&t=46541
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To make things easier, here is a the WAD with just the relevant maps. There will be missing textures but the bug still shows.
Just load the zip. No need to edit files or load anything else.
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I downloaded the WAD from there and loaded it on top of doom.wad. I had to fix a problem in one of the DECORATE files (the console identifies the appropriate file (decorate/decorations.txt) - line 996 has a ' that shouldn't be there). Then I started a game. The game started on E1M1. I looked at the automap and it was fine. When I was poking around in the PK3, I noticed that there was also a E1M4 map, so I used the console to get to that map and, when I did, all the numbers, status bar etc on the automap were black. If I bring down the console, it's mostly black too, as is the menu if called while the automap is in view. If I change back to the normal game view, the various elements look correct. For whatever reason, this only happens on E1M4. E1M1 is fine. This happens reliably for me with the official release and the most recently posted Git build.
Screen shots:
[spoiler]
[/spoiler]Procedure in video format:
Enabling/disabling the textured automap has an effect here. If I go to the automap and toggle the textured map on and off, the effect also toggles at the same time.
GeForce GTX 760 with up to date drivers.
