For most people who still does not realize whats added up in latest profile update
http://www.gaiaonline.com/forum/gaia-news-updates/staff-updates/t.63632027_1055/#1055
Gaia has added new default CSS:
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#gaia_header {display:block !important;
position:relative !important; top:0px !important; left:0px !important; width:100% !important; height:25px !important; margin:0 !important; padding:0 !important; z-index:9999 !important;
font-size:11px !important;}
#header_left {display:block !important; position:relative !important; top:0px !important; float:left !important; width:49% !important; height:25px !important; line-height:24px !important; margin:0 !important; padding:0 !important; z-index:9999 !important;
font-size:11px !important; text-align:left !important;}
#header_right {display:block !important; position:relative !important; top:0px !important; right:0px !important; width:49% !important; height:25px !important; line-height:24px !important; margin:0 !important; padding:0 !important; z-index:9999 !important;
font-size:11px !important; text-align:right !important;}
#header_left img {display:inline !important;}
#header_left ul {display:inline !important;}
#header_right ul {display:inline !important;}
#header_left li {display:inline !important;}
#header_right li {display:inline !important;}
#header_left a {display:inline !important;}
#header_right a {display:inline !important;}
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These new CSS is located as header styles AFTER user customization styles. You can found it on the source page of your profile page. Because of the overwrite-ordering basic in CSS, these rules will overwrites any same properties on the same target element.
There is of course workaround for that and you still can overwrite these new rules or even completely disables them if your know-how enuf.
Now then, I have bolded selectors and css parts that usually most users do customize. If you have those customized, maybe you should check again your profile to make sure things does not messed up.