setup lost after mozilla run

[Michal Kluka]

Hi!
    I have manually added following to my prefs.js:
user_pref("network.http.max-connections-per-server", 8). Than I have
started Mozilla & closed Mozilla and when I have looked into prefs.js
again, my added pref was not there. Is that known bug or am I doing
something wrong?
Michal
p.s. Using latest nigty build from 03/23/02.