GPL Violations of Miranda IM
Eesh writes "The Miranda project developers have recently posted to their development blog about two GPL violations of companies using their code - vBuzzer and StarMessenger. Today, they also posted that vBuzzer are taking steps to correct that violation. Hopefully this will work out fine. Miranda 0.401 stable was released recently"
One very simple way to at least detect potential similarities is to use strings. In certain situations, you can figure that it should not be likely that two programs would have such identical strings output.
From StarMessenger/core/miranda.c:Mmm... Enjoy that adware goodness...