Daniel, Gecko 1.9.0.x is the basis for Firefox 3.0.x (with the same 'x' in both places). So 1.9.0.5 (which is where this was fixed) will be used in Firefox 3.0.5.
Daniel, Gecko 1.9.0.x is the basis for Firefox 3.0.x (with the same 'x' in both places). So 1.9.0.5 (which is where this was fixed) will be used in Firefox 3.0.5.