Khaled sees every bug post, but as is often the case with developers, he doesn't respond to every post. That would take a considerable amount of time. He'll pay attention to bugs and if someone here proves it true or false, that will determine what amount of attention he puts into it. As stated, he may also test it himself before anyone else checks into it. In any case, he doesn't usually respond. On occasion, he'll comment if something will be fixed for the next version or to ask for additional information. But just because he doesn't reply doesn't mean he isn't paying attention. If the bug is legitimate and he can find the cause, it will get fixed.
