Validate GnuCash website

[Cristian Marchi]

While working on the beta website, i just checked how it validates [1] 
and there are many errors. I'm not an expert in this field so I'm asking 
if it's worth to correct them? If yes, is it better to use a HTML 4.01 
strict or a XHTML 1.0 strict doctype.
Always talking about website, the Search page is not rendered correctly 
[2]. Does someone know what's going on?

Thanks for any advice.

Regards
Cristian

[1] 
http://validator.w3.org/check?uri=http%3A%2F%2Fwww.gnucash.org%2Fbeta%2F&charset=%28detect+automatically%29&doctype=Inline&group=0&user-agent=W3C_Validator%2F1.2
[2] https://lists.gnucash.org/search/