I have recently build TPT, however I have noticed that I can not left click draw with a 1px brush size, cannot right click at all and when I do ctrl+shift click the program crashes due to a stack overflow.
I thought okay maybe its because this source code is still in development, so I downloaded the 44.7 source and compiled it, I had exactly the same issues. The program did recompile because now it says 44.7 at the top as the version number.
I have also tried turning off SSE optimizations, this has not fixed the problem.