designngised

Install the FileManager plugin for WP. Then navigate to wp-content/themes/arras/css/styles

Pick the stylesheet that your layout is using, for example default.css.

You can fully customise your nav elements here:

/* top menu */
#top-menu  { background: #111; border-bottom: 1px solid #333; }
#top-menu-content  { height: 25px; padding: 3px 0; }
#top-menu-content .sf-menu  { text-transform: uppercase; margin: 0 2px; }
#top-menu .sf-menu a  { display: block; text-decoration: none; padding: 7px 10px 8px; color: #AAA; font-size: 10px; border-right: 1px solid #333; }
#top-menu .sf-menu ul a  { border: none; }
#top-menu .sf-menu ul li  { border: 1px solid #333; margin-top: -1px; }
#top-menu .sf-menu a:hover, #top-menu .sf-menu li:hover, #top-menu .sf-menu li.sfHover, #top-menu .sf-menu ul li  { color: #FFF; background: #111; }
#top-menu .sf-menu ul a:hover, #top-menu .sf-menu ul li.sfHover, #top-menu .sf-menu ul li:hover { color: #373331; background: #FFF; }
#top-menu .sf-menu ul li.sfHover a.sf-with-ul { color: #373331; }
#top-menu .sf-menu li li a  { padding: 7px 10px; line-height: 1; height: auto; font-size: 10px; }
#top-menu .sf-menu .sf-with-ul  { padding-right: 15px; }
#top-menu .sf-sub-indicator  { background: url(../../images/dropdown.png) no-repeat; width: 5px; height: 5px; text-indent: -9999px; display: inline-block; position: relative; left: 7px; top: 0; vertical-align: middle; }
#top-menu .sf-menu ul .sf-sub-indicator	{ display: none; }
#top-menu .sf-menu li:hover ul, #top-menu .sf-menu li.sfHover ul { top: 2.4em; }
#top-menu ul.sf-menu li li:hover ul, #top-menu ul.sf-menu li li.sfHover ul, #top-menu ul.sf-menu li li li:hover ul, #top-menu ul.sf-menu li li li.sfHover ul { top: 0; }

/* main navigation */
#nav  { background: url(../../images/topnav.jpg) repeat-x bottom #322C2C; min-width: 990px; }
#nav-content  { margin: 0 auto; width: 978px; }
#nav .sf-menu  { float: left; line-height: 1.1; max-width: 770px; }
#nav .sf-menu a  { display: block; text-decoration: none; padding: 8px 12px 11px; color: #AAA; font-size: 14px; }
#nav .sf-menu ul li  { border: 1px solid #474331; margin-top: -1px; }
#nav .sf-menu a:hover, #nav .sf-menu li:hover, #nav .sf-menu li.sfHover, #nav .sf-menu ul li  { background: #373331; color: #FFF; }
#nav .sf-menu ul a:hover, #nav .sf-menu ul li.sfHover, #nav .sf-menu ul li:hover { color: #373331; background: #FFF; }
#nav .sf-menu ul li.sfHover a.sf-with-ul { color: #373331; }
#nav .sf-menu li li a  { padding: 7px 10px; line-height: 1; height: auto; font-size: 12px; }
#nav .sf-menu .sf-with-ul  { padding-right: 15px; }
#nav .sf-sub-indicator  { background: url(../../images/dropdown.png) no-repeat; width: 5px; height: 5px; text-indent: -9999px; display: inline-block; position: relative; left: 7px; top: 0; vertical-align: middle; }
#nav .sf-menu ul .sf-sub-indicator	{ display: none; }
#nav .quick-nav li  { padding-top: 8px; }

.quick-nav li			{ padding: 5px 0 0 8px; }
.quick-nav a:link, .quick-nav a:visited	{ display: block; text-indent: -9000px; width: 16px; height: 16px; float: left; clear: left; opacity: 0.6; }
.quick-nav a:hover  { opacity: 1; }

.quick-nav #rss			{ background: url(../../images/rss.png) no-repeat; }
.quick-nav #twitter		{ background: url(../../images/twitter.png) no-repeat; }
.quick-nav #facebook	{ background: url(../../images/facebook.png) no-repeat; }

Had a similar problem on Blacknight, WordPress was unable to write to the wp-content/uploads folder and add media, returned a http error. I went into my sites control panel and enabled PHP4 support as a CGI application. PHP5 was set to run as an Apache module. That did the trick.