This has been a problem for a long time but I don't think it's been mentioned before.
1. Choose a Discussion Board (e.g., Sports).
2. Using the middle blue button of [Top 10] [Search] [+ New Thread], perform a Search, e.g., Author impposter.
3. Open one of the returned hits.
4. Scroll down to "Back to Forum" and click that.
Now, here's the glitch:
Instead of getting back to the main forum page with "Sports" at the top, I get returned back to the SEARCH page with ALL individual posts (and their subject lines, not the THREAD subject lines) from all posters (not just impposter's posts).  
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Do you get the same result? It's supposed to go back to the "Sports" forum first page. This has been broken for quite a while. It happens on all of the boards I follow.  
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I don't think TER should try to fix it now and risk breaking more functions. Just put it on the "To Do" list of things to fix before any new rollout. ... Although I still think that switching to a well maintained, full function, open source Forum Software would be a better choice over a custom, self-maintained site.