I recently implemented Spam Karma 2 on my WP blog. The absense of constant comment spam was like an amazing breath of fresh air. But I'm running into a problem that seems to be stopping legitimate comments from getting through. I'm using SK 2.2r3 and WP 2.0.2.
Intermittently (yes, this is one of those frustrating intermittent problems that seem to come and go for no reason), when you enter a comment and attepmt to post it, you are redirected to a blank screen, with the URL being (I think) one of those intermediate PHP pages used in the commenting process. (I can't tell you exactly which one because, naturally, now that I'm trying to reproduce the problem, I can't.)
I'm using a number of other plug-ins -- Bad Behavior, Filosofo, and wp-cache. I've observed the problem with all three of these off; turning SK2 off made the problem go away immediately. I've also only recently started using SK2 and have never seen the problem before.
As near as I can tell, the comments aren't actually being sucked into SK's usual functionality -- they aren't showing up in the Spam Harvest or anything. They just aren't showing up at all. It's immensely frustrating as you can imagine, and I'm starting to get frustrated emails from users. If anyone else has noticed such a problem with SK2, I'd love to hear about how you solved it!