News of Zero duplicate

I installed advanced mod rewrite and zero duplicates for PHPBB3. Everything looked fine. Then, just for fun, I ran the W3C Validation tool on my page (http://validator.w3.org/) to see if PHPBB3 was compliant. The tool generated lots of errors. mostly from SIDs in the URL. http://phpbb3.phpbb-seo.net/ does too, so I'm assuming I installed everything correctly.

So my question is, have I found a bug? Does the validator see things the way Google and Yahoo are going to see them? This seems like it would not be good for ...

Hello,
I have that two mods installed and Print Version doesn't work.
http://stotis.net/viewtopic.php?f=1&t=3 ... view=print

phpBB SEO Zero Duplicate

• Title : phpBB SEO Zero Duplicate
• Author : dcz / http://www.phpbb-seo.com
• Description : This mod Will HTTP 301 redirect almost (100% in strict mode) all possible dupes in phpBB forums.
• Version : 0.6.8
• Installation Level : Advanced.
• Installation Time : 5 min.
• AutoMod: n/a.
• phpBB :3.0.9

Author's Notes :

• Will HTTP 301 redirect almost (100% in strict mode) all possible dupes in phpBB3 forums.
  
• You must run the phpBB SEO Ultimate SEO URL mod before you can use and install this mod.
  It is compatible with all 0.6.6 and ...