# Excerpt from file tx_rtehtmlarea_base.php

			/* =======================================
			 * LOAD CSS, JS and more
			 * =======================================
			 */

				// Preloading the pageStyle
			if(trim($this->thisConfig['contentCSS'])) {
				$filename = trim($this->thisConfig['contentCSS']);
				if (substr($filename,0,4)=='EXT:')      {       // extension
					list($extKey,$local) = explode('/',substr($filename,4),2);
					$filename='';
					if (strcmp($extKey,'') &&  t3lib_extMgm::isLoaded($extKey) && strcmp($local,'')) {

# __XXX__: This is the change
            # Changed by Johannes Bornhold, bornhold@regio-institut.de:
						$filename = $this->httpTypo3Path . t3lib_extMgm::siteRelPath($extKey).$local;
            # was:
            # $filename = '/' . t3lib_extMgm::siteRelPath($extKey).$local;
					}
				} elseif (substr($filename,0,1) != '/') {
					$filename = $this->siteURL.$filename;
				}
				$pObj->additionalCode_pre['loadCSS'] = '
		<link rel="alternate stylesheet" type="text/css" href="' . $filename . '" />';
			} else {
				$pObj->additionalCode_pre['loadCSS'] = '
		<link rel="alternate stylesheet" type="text/css" href="' . $this->extHttpPath . 'htmlarea/plugins/DynamicCSS/dynamiccss.css" />';
			}

				// Loading the editor skin
			$skinFilename = trim($this->thisConfig['skin']) ? trim($this->thisConfig['skin']) : 'EXT:' . $this->ID . '/htmlarea/skins/default/htmlarea.css';
			if (substr($skinFilename,0,4) == 'EXT:')      {       // extension
				list($extKey,$local) = explode('/',substr($skinFilename,4),2);
				$skinFilename='';
				if (strcmp($extKey,'') &&  t3lib_extMgm::isLoaded($extKey) && strcmp($local,'')) {

# __XXX__: The following line was my inspiration
					$skinFilename = $this->httpTypo3Path.t3lib_extMgm::siteRelPath($extKey).$local;
				}
			} elseif (substr($skinFilename,0,1) != '/') {
				$skinFilename = $this->siteURL.$skinFilename;
			}
			$this->editorCSS = $skinFilename;
			$pObj->additionalCode_pre['loadCSS'] .= '
		<link rel="alternate stylesheet" type="text/css" href="' . dirname($this->editorCSS) . '/htmlarea-edited-content.css" />';
			$pObj->additionalCode_pre['loadCSS'] .= '
		<link rel="stylesheet" type="text/css" href="' . $this->editorCSS . '" />';