2.5.1.3.test @ 2011-Nov-30 00:07 - win32 build, sources
[+]Added process_priority config variable. 0 - NORMAL_PRIORITY_CLASS; 1 - HIGH_PRIORITY_CLASS; 2 - REALTIME_PRIORITY_CLASS.

2.5.1.2 @ 2011-Nov-25
[+]Added device selection to portmidi player. Controlled by the snd_mididev config variable. See stdout.txt for list of available devices.
[+]Added a progress bar for demo skipping during re-recording.
[+]Added key binding options for start/stop and fast-forward when watching demos.
[+]Added a key binding option to restart the current map.
[+]Added a "Default compatibility level" GUI entry.
[+]Support for 16 sprite rotations. http://zdoom.org/wiki/Sprite#Angles
[+]New HUDs. HUDs definitions are moved to the "prboom-plus.wad/-prbhud-" lump.
[*]Fluidsynth player now resumes notes seamlessly after a pause.
[*]Speed improvement on maps like sunder.wad map10 and nuts.wad.
[*]Force GL_LINEAR for MAG filter for textures with detail.
[-]Fixed buggy music that forgets to terminate notes held over a loop point. SDL_mixer does this as well. Fix tested against Doom2 map14 and FreeDoom2 map01, for fluidsynth, portmidi, and OPL players.
[-]Fixed buffer overrun in OPL2 player.
[-]Fixed crash in video capture code when "Use GL surface for software mode" is enabled.
[-]The screen wipe after pressing the exit switch on a level was noticably jerkier.
[-]MBF-added codepointers worked with any complevel.
[-]Fixed HOMs on skies with transparent pixels. Sky2 @ doom2.wad, for example.
[-]Alpha channel did not work for 8-bit PNGs with alpha.
[-]Transferred standard sky was drawn badly when FOV > 90 (Voodoo Guns - map02).