I do not see such a warning on your blog which we now have two links to as it's also linked to your username. Please try these troubleshooting techniques:
1. Some issues that you encounter with your WordPress.com blog or account can be solved by changing your browser settings, refreshing the page, or clearing the browser cache and cookies. See here > http://en.support.wordpress.com/browser-issues/ The instructions for specific browsers are found here > http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=32050
2. Some issues can be resolved by using another browser? If you haven’t tried another one then I suggest that you do.
3. Some issues can be caused by not updating your Flash. You can use this link to see if your flash is up to date. http://www.adobe.com/software/flash/about/ If it’s not then go to http://www.adobe.com/products/flashplayer/ and download and install the latest version of flash.