For some reason, all XHTML files in my projects display the following warning validation message: "Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" W3C team (the one that hosts the referenced DTD) explains that the 503 code is the result of excessive traffic (http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic) - basically, they expect everyone to cache the DTDs and not to request them every time a page is validated, and they block IPs that request the DTD too often. This, aparently, includes JBoss Tools that seem to be coded to request the DTD every time (the messages didn't appear until I installed JBoss Tools) Are there any plans to follow the W3C recommendations on this matter? Thanks, Alex View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4247001#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...