I just downloaded and installed v.3 and took the TBS duplicated content checker for a "spin." The first time I tried this out, I got an error (was not able to duplicate the error) that shut down the application. I started up again, loaded my article, and this time was able to check for duplicate content. The second time there was no problem.
I have to say that this is really thorough! Maybe too thorough, if that's possible. What I mean is that this apparently compares content as if with a fine-tooth comb and pulls out even two and three word phrases. I'm not too worried if I have a few duplicate "and the" phrases, or a few duplicate "one of the" or "even though" phrases. These sorts of phrases are largely transitional and connective in nature and do not significantly influence the core, semantic matrix of the articles.
Thank you, Jon. This is a fantastic addition to the Spinner.