I have found that if you accidentally happen to have invalid CustomCSS for some reason (for example, you put some character in front of <style type=text/css>) , all your CustomCSS will be reset to default (ie deleted). I think there should be an error message instead which says something like: "Your CustomCSS could not be saved. Please make sure your code is between the <style>-tags."

I'm not a huge customCSSer, but I can see that being very useful. Isn't there a way it could still be there but just not put into effect because there's an error?

It seems frustrating that the whole thing could be wiped out due to an error. :x

Ugh. Yes. I hate this when I'm not trying to do a full layout and am really only wanting to tweak the default one. -Headdesk.- Just something like 'Sorry, please re-check your code!' or something. Just don't wipe it out. ;o;