I use Yoast’s SEO plug-in on the WordPress sites that I work with. I haven’t always used Yoast’s plug-in, but once it came along I switched everything over and haven’t looked back. It’s a great plug-in that I highly recommend to tune WordPress sites for search.
I ran across a warning a few days ago that a feature is being discontinued and I wanted to alert my readers. The message is burred in the Permalinks settings of the plug-in, and it’s marks a pretty significant change that could break incoming links and harm your SEO efforts, if the notice goes unheeded.
You need to check your installations, disable the Strip Category Base feature, install and activate the FV Top Categories.