missing gear intermitently between 3rd and 4th

Hi,
Every now and then on my ZZR 250 I hit neutral between 3rd and 4th. It is probably because I am being a bit lazy hitting the gears firmly, but is it a really bad sign of gear damage or should it be OK.
Cheers
Every now and then on my ZZR 250 I hit neutral between 3rd and 4th. It is probably because I am being a bit lazy hitting the gears firmly, but is it a really bad sign of gear damage or should it be OK.
Cheers