duplicate meta

Hey guys, I have noticed that my Google Webmaster Tools is reporting a bunch of duplicate meta descriptions, short meta descriptions, and duplicate title tags..... all of which are coming from my forum. Here are a few examples: Can I use my robots.txt to fix this problem? Any suggestions...

Google Webmaster tools is flagging up a lot of duplicate title meta tags (in HTML Improvements) due to a resource and its associated discussion being seen as two distinct pages but with same title tag. I believe for better SEO this should not happen, should there be a rel=next/prevous...