Image tag automatically appending some parameter


I just took over some project and I noticed some odd behaviour : every
image_tag executed inside my views generate the needed code, but also
append some sort of non random parameter wich I never asked for !

For example :

= image_tag 'tables/first.png', :border => 0, :class => 'first'

will generate :

<img border="0" id="bottom_connexion"
src="/images/tables/first.png?1268837874" />


How can I get rid of this ' ?1268837874 ' ?



You can find more information here:

You can find more information here:

I think that one is a bit confusing.

That one explains it well for me.