While we are always happy to take a close look at peoples forum setups etc.,  there is actually nothing for us here to fix. This is not an SP error. If it was then we wouldn’t have any users at all!

This is something else on your site at work. Did you give any thought at all to what you were doing before it happened again? This was actually a good and serious question.

On top of actually thinking about that then I would also suggest you taje a closer look at the plugin WP No Category Base. Here is something you have active that actually states quite categorically that it performs redirects and I know it should have no impact on the forum but it is worth checking.

Thanks swordfish, I have changed the plugin. Will let it run for a few days.

Thanks very much.

please let us know how you make out…

I have disabled WP No Category Base. use the other similar plugin instead.

So far so good.

good news! thanks for the update… fingers crossed… the problem with some of these plugins that do redirection is that they assume page content is static – which it does not have to be…  simple press, ecommerce and other plugins generate dynamic content and use url rewrite to give appearance of many pages on the single wp page…