I am not sure it is linked to the theme... I browsed through all the ones available in Ubuntu and still get the exact same issue (c.f. screenshot space between the sound icon and the battery one).
In addition, I set the applet up to not show the envelope for GWibber, Evolution and so on, but now instead of the envelope I have a huge gap (c.f. screenshot space between the sound icon and tomboy).
I am not sure it is linked to the theme... I browsed through all the ones available in Ubuntu and still get the exact same issue (c.f. screenshot space between the sound icon and the battery one).
In addition, I set the applet up to not show the envelope for GWibber, Evolution and so on, but now instead of the envelope I have a huge gap (c.f. screenshot space between the sound icon and tomboy).