Admin Forum:Edits to the Common.css don't seem to do anything

I started a wiki a few days ago, and I wanted to start creating classes for tables in the Common.css file. I started by trying to edit the "infobox" class, and that's where I started being in trouble, since none of the changes I make seem to work. Yes, I have emptied the cache — I actually emptied it manually, and when it still wouldn't work, I went to a different computer that didn't have any page of the wiki cached at all so far, and still no use. Even a simple change such as changing to to "float:left" doesn't seem to do anything. The thing is, the class infobox does something, just not what the CSS says it should. Does anyone know what could be the issue here ?

PS: just in case anyone wants to check; here's my sandbox over there where I've been trying to make various infoboxes just for the sake of it. http://ss-snark.wikia.com/wiki/User:-Alarielle-/Sandbox#CSS_tests

Thanks in advance for your help. (And if it renders properly for you, feel free to tell me that I'm crazy and/or an idiot. I am aware I am, for the biggest part, a novice). Alarielle Fighting fate ! 23:29, October 10, 2012 (UTC)