The reply and create new topic text boxes for DIC have their blinking cursors disapear after a certain amount of time, usually 30 seconds to a few minutes. The result is that you cannot see where your characters will appear.
Ths does not just happen here but also on physicsforums.com.
I've tested this with Internet explorer 9 in Windows 7 Ultimate 64 Bit service pack 1.
This post has been edited by Vodkacannon: 25 December 2012 - 05:13 PM
This sounds more like a flaw in the browser than a problem with the website. I don't believe website code can even hide the write cursor; it's something it has no control over. (Short of creating a "virtual" textarea using HTML, which is not done here.)
I'd suggest using a better browser. Like Chrome, Firefox or Opera. You can also get a preview release of IE10 for Win7 now, which is a big step up from IE9. Though, I wouldn't exactly recommend pre-release versions for general use.