Replying to Problem with posting buttons (flash embed, link, etc.)

So earlier I was trying to make a thread where I wanted to embed multiple YouTube videos and I was having a bit of a problem. It seemed like the buttons at the top of the message body window were on some kind of timer, strange I know. At most I could get two embed's posted before the button stopped working. Normally you will put your mouse over one of the buttons and it will be highlighted orange and you can click to use the necessary tool. However after around 30-45 seconds these buttons just stop working. it doesn't matter if it is the link tool, embed, bold, any of them. In fact they have stopped working as I type this post. I'm wondering if anyone else has had this problem and if it is due to something wrong with NS or if it could be something to do with my comp.