As part of reactivating my blog, I’ve had to grovel through over 160,000 back comments over 99% of which were blog spam. I’ve been doing this by skimming 500-comment chunks of the back list (it’s normally 20, but I know where to hack the WordPress code to change that). In the process, I have almost certainly made some errors.
So if you submitted a comment recently and have not seen it published, don’t assume that you’ve hit a mechanical spam filter or that I’m purposely deleting your posts. I may have deleted some by accident while skimming. I apologize, and devoutly hope you will never find yourself having to filter that much spam by eyeball.
(And before you ask: Yes, WordPress’s tools for the job are both weak when they work and buggy in crucial spots. WordPress looks nice but the more I get to know the PHP codebase the less I like what I see.)