One of the interesting side benefits of Open Source Software is that holes are patched VERY quickly. Conversely, many large companines including and mainly Microsoft, will sit on a "flaw" for several months if they deem it as "not critical". Then someone usually gets ticked off that it hasn't been patched, writes some light-duty malicious code, and suddenly Microsoft will finally patch that flaw.
Microsoft's mentality of computing doesn't exist in the OSS world. Funny thing is, all MS has to do is FIX it quickly. But they play politics with their own products rather than providing fixes do their products.