Annoyed that maxing a stat to 10 is a waste in Fallout 3 due to the bobbleheads? This mod gives you a reason to max things.

Removes the SPECIAL stat check from the bobblehead scripts so it gives +1 to the relevant SPECIAL stat even if you have already maxed that stat at 10. This +1 is "invisible" as any player stat over 10 is rounded down to 10. This "invisible" +1 only comes into play when temporary SPECIAL stat reductions are applied. ie: Drugs, radiation, equipment.

For example:

If your base agility is 10 and you collect the agility bobblehead your agility will still be 10 as values over 10 are rounded down to 10.

If however you then put on power armor, reducing your agility by 2, you will be left with 9 agility. This is where the "invisible" +1 from the bobblehead comes into play.

Base Agi 10 + Bobblehead + No Reductions:
Agility = 10 (Base) + 1 (bobblehead) = 10 (11 is rounded down to 10 for the final value)

Base Agi 10 + No Bobblehead + Power Armor:
Agility = 10 (base) - 2 (power armor) = 8 (Final Value)

Base Agi 10 + Bobblehead + Power Armor:
Agility = 10 (base) + 1 (bobblehead) - 2 (power armor) = 9 (Final Value)

NOTE:
This mod is not retroactive. It only changes the script when you actually pickup the bobblehead. Any stat adjusted by this mod will be permanent on all saves after this point. If you wish to remove the effect, you will have to open up your console and manually subtract the bonus stat using the "player.modav" command.

See wiki page for full details: http://fallout.wikia.com/wiki/Console

Quick example for the lazy people:

This will remove one from agility (reversing the mod) for the agility bobblehead.
player.modav agility -1

If the mod is applied after a bobblehead is picked up, you can manually increase a stat using the following command
player.modav agility 1