Widgets that are embedded within the main site have the following h2 style:
.widgetContent h2 {
font-size:1.2em;
margin-left:10px;
font-weight:bold;
}
however, there isn't a style for widgets that are embedded within iframes.
To reproduce, go to demo.piwik.org - select Widgets -> Visits Summary -> Overview with graph. Copy and paste the iframe link to a page and view. You will notice the h2 tags doesn't have any left padding, whereas when the widget is viewed within the piwik site, it does.
I've attached a patch that adds a style with left padding only.
Attachment: patch to add style
widgetH2padding.patch
(In [6082]) Fixes #3044