Negative Intelligence, skill points, and level-up attribute points

[galahad2112]

So, I'm aware that a character ALWAYS gets at least 1 skill point per level, no matter how low their Intelligence. I'm also aware that favored class and Human bonus skill points are added after determining class-and-Int based skill ranks. Thus a Human Fighter could have 3 skill points/level, even with a 7 Intelligence.

Here's my question: If said Human Fighter puts the bonus attribute point gained at lv.4 into Int, does he then gain retroactive skill ranks, as his Int mod has increased? Or does nothing happen, as he's still got a negative Int modifier? I know that going forward, he will still get 3 points, not 4, per level, but would he gain a one-time bonus 4 skill ranks?

[Chess Pwn]

The fighter would not gain any skill points as his Skills per Level is still 1. But if you were a barb that normally had 1(4-3) skills and raised it up so it would be a 2(4-2) then yes, you'd gain the skill points retroactively.