I used the newest build and yes shaders is increases but not unlimited , atleast not for me , more then 1 gig with maps it cannot handle even with svn build you see missing shaders then
1.21 G in data dir , but now shaders isnt a problem but textures and maby later items or other stuff , items also limited in quake3 255 items or somthing
im trying to find that q3 program that fetches maps from other dirs and place it in data as a temp file so the data dir doesnt grow to big
then you can have unlimited maps without eating all your ram