If you have a problem with the game, please explain it such that other people can understand what the problem is, realize whether or not they've seen something similar before, and hopefully help you find a solution. As a general guideline, imagine you have to explain to a friend what is happening so they can give you some advice. That should be a good way to gauge how much and what type of information you should give. You can, and should, also write down your issue (again, in a detailed way), on the Helpdesk, so that any potential problem, if there is any, can be resolved by the developers as soon as possible.
But if you just want to write a rough sentence in the title and "wtf" in the thread's body, that's okay too; this forum isn't super-restrictive on what kind of content is and isn't allowed.