There is a redirect to a Russian site that has been attached to the site home page and probably the forum page(s). It loads a JAVAscript files that does various undesirable things. Common up-to-date virus and malware checkers will stop that, but it's a PITA. Working to get it off.
In meantime, disabling JAVAscript in your browser is another approach.
BTW, these attacks have been hitting other sites, like MSN.
Sorry for the troubles.
Rich