it should scare one that the search index gets broken within CS, hopefully this affects only the 3.0.0 pre-release version.
Regarding search engines I see some more issues but one should carefully tune the robots.txt file to make sure not to drop results.
There are quite a few pages (Home, Overview, All, Discussions) which link to the same thread - but they use different target URLs. This may result to multiple (google) search results. I wonder if it makes sense to add also
to make sure that only “/community/thread/12345” will be found. Modifying Clearspace to return a unique link for each thread (similar to /docs/DOC-1234) would be a much better solution.
-> this one page has “Previous” and “Next” links
So I did another google search for `“Firefox is crashing when doing Reply” +site:.igniterealtime.org´ which returns 76 results. So one may want to drop also “jsessionid=” - I really wonder how google gets the ID. It seems that that every time it scans for content it gets a new ID.