Well, for what ever reason (I guess, they had to celebrate something), SL
changed with version 1.30 the equalizer one can seen on all the billboards
of the SUPERSONIC color scheme. However, with version 1.40 we got the
original equalizer back (the one without the Lemmings xD).

With version 1.40 I also recognized a slight change in the "dynamics" of the
zone craft. On high speeds (depending on the track) you will recognize that
the craft is a bit less likely to oversteer on being hard on the airbrakes.
However, I can't really judge whether this effect is due to a change in the
dynamics or simply due to a better recognition of the inputs. But I guess
the game handles the inputs a bit better now. Quickly releasing an airbrake
seems to be getting registered a bit faster. I recognized this effect because
I had to counter airbrake (to straighten out the craft) a little less than before
on some given sharp turns.