Perhaps you should read the thread and see what the issues are - it's not only possible, but highly likely for software to have issues without being flaky & unstable.
Let me ask this question, what operating system are you running, there's a 90% probability it's a Microsoft OS, and a 98% probability that Microsoft is going to release a patch for it next Tuesday - so we can probably agree that it has issues, so here's the question, is it flaky or is it stable enough to be used.
For what it's worth - I'm running the 1.09 beta firmware on my DNS-323, and if you're curious, Server 2008, Server 2003 and a mixture of Windows 7 Pro, Windows Vista & Windows XP Pro as my client OSs.