Do more on the web, with a fast and secure browser!
Download Opera browser with:
Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
There's a similar thread here
I had the same issue on facebook. Couldn't get the cursor to show in the comment box, thus been unable to leave a comment. Clearing out opera's cache solved the problem for me.