Thanks for the comment - which I only just noticed since it wasn't an immediate reply.

You are correct the setup of the default width was broken. I didn't realise because I've always called it with an explicit width in my code, now I have a small test case collection which caught it.

I'm not sure what more I can do to "dress it up" as you suggest - the core of the module is very simple, and I think it does all it needs to now. Still I'd certainly be interested in any concrete suggestions. As things stand it is working nicely upon my website and processing all the comment texts nicely ..