Gratuitous Tank Battl;es has had a patch to version 1.012, here are a few of the major changes:
1) Support for new detail textures in closeup
2) Tanks now take corners smoothly
3) Graphics detail slider now adjusts lengths of tank tracks.
4) Fixed bug where weapons that had an already selected target could still fire at it when it was within minimum range.
5) Fixed Steam achievement bug
6) Possible fix for steam-integration slow