add me on xfire or whatever then since i aint posting some dl link here 
xfire : samp0
and yea i got such a huge box too wich i used to test… guess ill find the like 2 remaining leaks and remove the box then 
edit: did help ^^ lost over 6000 portals for sure lol
edit2: i think i found my problem… im so stupid…xd… removed some hugeass thing and lost over 30.000 portals
12369 left xd still too much though ._. /vsay needbackup
problem solved…
i tried gtk 1.5 once with that prt viewer
and i saw that noobradiant made portals over the whole map with the 1024x1024
so i made 1 huge caulk room around my map again and now i got 5055 portals and can make -vis
here sampo. read this here --> http://www.nibsworld.com/rtcw/tutorial_detail_and_hint_brushes_part1.shtml
you probably wont ever need to read anything else, caus in there, there are all solutions for your problems. take 1 hour, caus that was about the time it took me to read it, and after that hour you will be able to understand all the strange things happening during vis compile and parts of the bsp-phase. i really admire the math behind it, yet im not able to touch calculations like this, and so you will. but it gives you at least a little understanding and therefore satisfaction when you at least know roughly what is going to happen. and thats all you need as a mapper. leave the math to programmers
edit: and btw.: i dont think your problem is solved proper ^^ only a presumption. can be wrong.
well my problem was that i can’t make anything with -vis xd
other problems might come now but we’ll see about that later…
if i still need to reduce portals i know now how pretty much more than i knew before i got this error