This is patch what I am using and have no problem with zone memory
I tested that with old vanilla renderer and XreaL renderer (I tested old UrbanTerror)
You can test map -
http://et.trackbase.net/index.php?mod=mapinfo&midx=5041
http://filebase.trackbase.net/et/maps/wf_temple_c14.pk3
its reported (on SD forum) that it to give Z_Malloc crash.
http://www.splashdamage.com/forums/showpost.php?p=364880&postcount=564
daz2007 (mew4) opened ticket ID: 3361976 (Memory Leak opened on 2011-07-10) so you can close ticket
Also you can close ticked ID: 3361980 (Slow Startup opened on 2011-07-10), because it more system related then really bug.
I saw system, where GLSL files are compiled in something more then 3-4 seconds. On my system GLSL shaders are compiled on 14 sec (ETXreaL-0.3.0 version), on ATI Radeon 4850 with 512 MB DDR3