This this the milion dollar comment, please read it twice.
The Question Mark is bad for the SEO!!
After I Installed the QA on my blog: http://www.9comp.com/qa
Google found the pages with the "?" (the comments in the questions) as "duplicate title" of the "Question source" !!
Also google thought that there are duplicate Meta descriptions between the source Q and the comments with the "?"
You must remove the "?" from the comments!!
A good url of comment need to look like this:
(with the #)
This is the orginal Q: http://www.askpavel.co.il/qa/10909
Also you must have canonical line for each Question:
<LINK REL="canonical" HREF="http://www.askpavel.co.il/qa/10909/">
The Q&A can harm you blog if you don't Integrate it by the book! (the book of SEO)
Google will see the Q&A system as SPAM if you didn't set is well.
Hagy Levi 9comp.com Israel