Got an email and a phone call from one of my clients today.

Google had sent him an email stating that:

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While we were indexing your webpages, we detected that some of your pages were using techniques that are outside our quality guidelines, which can be found here: http://www.google.com/support/webmasters/bin/answer.py?answer=35769&hl=en. This appears to be because your site has been modified by a third party. Typically, the offending party gains access to an insecure directory that has open permissions. Many times, they will upload files or modify existing ones, which then show up as spam in our index.
The following is some example hidden text we found at http://myclientsdomainl.org/:
http: // www. movie2b .com/
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I reviewed the site and found that a link had somehow been injected in a Text/HTML module.  While building the site we had specified that the Text/HTML module in question be set to show on all pages on the site - so the movie2b link was on each page given a position such that it would not be visible, e.g. style="top:-7684px;position:absolute;"

My SEO guy has found a notable number of DNN sites that have the same problem - somehow movie2b or some black seo agency has been somehow hacking into dnn sites.

Has anyone else noticed this problem?

Any idea as to how they hacked into the sites in order to add their link? I can provide a list of other dnn sites that we have found that have been infected if anyone is interested.

Thanks.

... and please review Cathal's blog:

http://www.dotnetnuke.com/tabid/825/BlogID/28/ParentBlogID/5/Default.aspx

The site that we built for our client is version 4.08.04

thanks