3.0.0 removed the URL filter… is that part working for you or do you think you want to add it back in? https://gist.github.com/pmgllc/5705808
I’m not sure what you mean by the above.
I should probably mention that I’m also using Login Security Solution and WP Super Cache, but there is no improvement when turning either of those off. I’m also using WP E-Commerce.