I realize that FPS has nothing to do with ping and was not talking about low frames. I did increase my per user bandwidth to 2500 and that helped some on this map but I still have problems. I dont really know why and like I said before there are only SOME people on my server who have a problem while others are fine. I run 20 plus new maps on my server and this is the ONLY one that has this anomoly.
People with high speed connections will be fine and all of a sudden their ping will jump from 50 to 300 on this map and then they will start lagging badly. I have tried it several times and it happens every time.

Very wierd problem I must say...

Yeah caulk is every mappers friend... but dont you just hate this dang blank_lightmap texture, which is easily mistaken for caulk but results in fucked up fps (cuz it draws surfaces in white)?

that would be awesome. I too have the same problem..