pref vs user_pref

[Racer]

In all.js, the format of all of the prefs is pref("prefname","prefvalue").
In user.js (and prefs.js), the format is user_pref("prefname","prefvalue").

I assume user_pref() should not be used in all.js because that applies to all users. So what happens if it is used there?
I also wonder what happens if a pref() entry is made in user.js or prefs.js. Any ideas?
Finally, are there some prefs that only work if defined as pref() and won't work if it is a user_pref()? I have heard people in the past say that pref x must be added to all.js (not user.js) and was wondering if this is the cause.

[danm]

I'm not going to take the time to write a considered response because I know from experience that you don't read my posts, Racer. But I will say that nearly all your questions can be answered with a bit of harmless self-experimentation.

[ehume]

Check out Firefox help on Texturizer. The answers are there.

[Racer]

danm: Correct...and by the same token, these forums are useless.

[GrailKnight]

Another satisfied customer.