Go to your style.css
file in your Theme and change the margins for the ul li, ul ul li, ul ul ul and so on.
Customizing Your Sidebar
Styling Lists with CSS and WordPress
There setup liks this:
ul {
margin-top: 0px;
margin-left: 0px;
margin-bottom: 0px;
padding-left: 0px;
}
li {
list-style-type: none;
margin-left: 0px;
margin-bottom: 0px;
padding-left: 0px;
But still the same problem.
Well, in Firefox, it isn’t indented. BUT the rest of your sidebar does not feature lists, only line breaks in paragraphs. The only one in a list is your Dates to Remember. Take it out of the list format as you did with the rest of the lists.
I don’t think the plugin you are using forces lists, unlike the other ones that you had to add parameters to force them out of links. So get rid of the lists and the style sheet won’t matter so much.