this is mostly for bug and doub.

tremfusion 0.99r2_R1368 win_mingw-x86 Jun 6 2009
----- FS_Startup -----
execing default.cfg
execing autogen.cfg
execing autoexec.cfg
couldn't exec autoexec.cfg
----- Client Initialization -----
----- FS_Startup -----
execing autogen.cfg
execing autoexec.cfg
couldn't exec autoexec.cfg
----- Initializing Renderer ----
-------------------------------
QKEY found.
----- Client Initialization Complete -----
----- R_Init -----
----- finished R_Init -----
------ Initializing Sound ------
SDL_Init( SDL_INIT_AUDIO )... OK
Loading "OpenAL32.dll"...
OpenAL default capture device is 'Realtek HD Audio Input'
OpenAL capture device opened.
Sound memory manager started
Loading vm file vm/ui.qvm...
File "vm/ui.qvm" found in "C:\Program Files\Tremulous\tremfusion\z-tremfusion-menu-0.99r2.pk3"
^1ERROR: ui/tremulous_humandialogs.menu, line 54: unknown menu item keyword autowrapped
^1ERROR: ui/tremulous_aliendialogs.menu, line 54: unknown menu item keyword autowrapped
^3WARNING: help file 'ui/help.txt' not found!
SSE support is version 0
--- Common Initialization Complete ---
Winsock Initialized
Hostname: Game-Core
IP: 10.0.1.156
Opening IP6 socket: [::]:30720
WARNING: NET_IP6Socket: socket: WSAEAFNOSUPPORT
WARNING: Couldn't bind to a v6 ip address.
Opening IP socket: 0.0.0.0:30720
^3-> ^7/sv_pure 0
^3-> ^7/devmap world_b1
------ Server Initialization ------
Server: world_b1
----- R_Init -----
----- finished R_Init -----
----- FS_Startup -----
Sys_LoadDll(game) failed to load library
Failed to load dll, looking for qvm.
Loading vm file vm/game.qvm...
File "vm/game.qvm" found at "C:\Documents and Settings\Garret\Application Data\Tremulous/base"
------- Game Initialization -------
gamename: base
gamedate: Aug 28 2008
^3!readconfig: ^7could not open admin config file admin.dat
using layout "*BUILTIN*" from list ( *BUILTIN* )
********************
ERROR: SV_SetBrushModel: NULL
********************
----- Server Shutdown (Server crashed: SV_SetBrushModel: NULL) -----
==== ShutdownGame ====
----- CL_Shutdown -----
-----------------------

that is what happened when I tried to dev my map.

In my opinion this can mean 3 things (I could be wrong):

1. You need to use the default tremulous HUD.
2. You used/have a bad brush.
3. You compiled it wrong.

I havent change my hud so I go for #2 and 3 oh and if its the brush here is my response... F u GTK!!!!

mmm Null brush, for me, usually means you have an entity with no parameters. Just check all your entities one by one (L I think the shortcut was) and the one or more that doesn't show, simply delete.