from what ive read, and i really have no way of knowing if this is true or not, but that error is caused when a server sends either too much data, or data too fast for the client's internet connection. i dont mean to talk bad about your internet connection, but it would make sense that the server you run on your computer wouldnt cause this problem since you're outgoing bandwidth probably could not generate the volume or the speed required to make the error. further, ive read that a possible (emphasis on the possible) solution is to shorten the length of your motd.txt file and disable the motd in statsme (if you run it).
using this theory, you could probably determine which other plugins you might be running that would generate more data. you might also want to try some of the
possible solutions that edge offers in his other posts.
some other interesting points:
- now, i dont mean to brag, but my internet connection at my school (where i live most of the time) is absolutely amazing. what makes this interesting is the fact that i have almost never had this disconnect problem. the only time it's ever happened to me was while playing in a full 32 player person that runs wc3mod and statsme and god knows what other plugins.
- I have never heard of this problem causing disturbances in CAL matches or scrims. what makes THIS interesting is that in CAL, no MODS (statsme, amxmodx, hlguard) are allowed, which would, in theory, make the server generate less data to send to the clients than a server that DOES have such mods.
- In CS:Source, there is a function called r_cleardecals (which removes all cached custom decals). maybe valve has learned something about this error and is implementing it CS:S to test it... (ok i admit, thats a longshot ;p) however, in CS1.6, there is a command called rcon decalfrequency, which dictates how often a player can use a spray... you could try setting this to some insanely high number like 360, so a player can only spraypaint once every 6 minutes.
again, these are all shots in the dark, but they appear to have at least some logical backing; might as well try it out.
-glhf, please let us know if you make a breakthrough

. and I, for one, certainly hope that you do.