Unless you're not actually using Tixati 2.67, in which case the tracker will see two different client versions used at the same time for no obvious reason, not to mention the older one would also happen to be the latest a certain ratio cheating program can emulate. Put yourself in a staff member's position, how would you react?
Anyway, Tixati could be a good client for all I know, but I'll never actually find out, because its interface is so awful... but the 2.81 client file is up.