... as with many things in SEO, there are two schools of thought...
I don't want thousands of outcoming links, just few, as I am building my site to become the "authority hub" for that particular topic, and for that it makes sense to link to other sites that rank above me. (Moreover, the sites above me are mostly universities, and I have no chance to get a reciprocal link from them. And I am one of those who does almost no or very little reciprocals.) Btw. I will not link with keywords that I target in anchor, but I will usually put just the other site's name in anchor. That's somewhere along the lines you followed when you changed the anchor of minibb from "minibb" to "minibb forum software" (at least that I understood from some post on this forum).
The SEO theory is that I will be loosing on pagerank, that would otherwise distribute to my other pages, but pagerank is not "the king", when I search, often lower pagerank pages rank higher than high PR pages for particular keyword searches.
I know this theory might be wrong, but there is only few things in SEO that are "confirmed" and stable when it comes to the future evolution.
Thanks for the advice!