Problems with jQuery's fullcalendar and jQuery mobile

With CSS of the start theme

I ran into a problem to combine fullcalendar which is bundled with jQuery and the instant use of jQuery-Mobile: The CSS are not compatible. If I put the elements delivered with jQuery Mobile everything works fine (stylesheet of jquery mobile). If I put the css-file for jQuery (Start-Theme) the icons get lost in the mobile buttons. Any suggestions?

With CSS of the jQuery-mobile

The following works not:

<link rel="stylesheet" href="css/jquery-ui-start.css" />

<link rel="stylesheet" href="css/jquery.mobile-1.1.0.min.css" />

in combination!