Live CSS stopped working

Hi. The plugin recently stopped working.
I make changes to the css code in the live css window and nothing happens on the page. I have to save and refresh page to see changes.
I love the plug-in, it makes my life easier and would love to get it working again.
Any ideas as to what could be causing this?
I tried different browsers (safari and chrome) to see if this was related to browser cache, but no luck.

I hope you can give me some ideas.