X5 code questionable 
Autor: Jesse S.Google is reporting the following code as suspect: < script type="text/javascript" src="res/swfobject.js"> < / script > 17:< script type="text/javascript" src="res/jquery.js?1975"> < / script > 18:< script type="text/javascript" src="res/x5engine.js?1975"> < / script > 19:< script type="text/javascript" src="res/x5cartengine.js?1975"> < / script > 20:< script type="text/javascript" src="res/l10n.js?1975_635206405859340635"> < / script > 21:< script type="text/javascript" src="res/x5settings.js?1975_635206405859340635"> < / script > 22:< link rel="icon" href="favicon.png" type="image/png" /> 23:< meta name="google-site-verification" content="ElZ-OtlEJEjOUV2qZPUGoOCRTh39oIukiGAhS7Vnzfs" /> 24:< script type="text/javascript"> x5engine.utils.imCodeProtection('');< / script > 25:< meta http-equiv="Expires" content="0" /> 26:< meta name="Resource-Type" content="document" /> 27:< meta name="Distribution" content="global" /> 28: < meta name="Robots" content="index, follow" /> and has tagged our site 'this site may be hacked' - any ideas?
clear all the files that are on the webhosting server. change your password of your webhosting connection.
Do a complete new upload of your site.
usally this helps, sometimes somehow hackers know their way to files and change them a little bit.