Are Sploggers Getting Smarter?

Some time ago I switched from using Akismet to Mollom. When I made the switch I was preparing to (finally) migrate to Drupal 6, but that project has stalled. I also though it would be a better idea to use something developed by Acquia, rather than the competition.

After switching to Mollom I noticed the number of comments I was getting went through the floor, even though I kept the module up to date.

After some complaints from users I disabled caching and allowed Mollom approved comments to be posted without moderation.

There has been a big problem with my recent changes - the sploggers are winning. It seems if a splogger quotes a paragraph or 2 from the item they are commenting on, they’re getting through. I haven’t been able to find a way of telling if it is humans entering the CAPTCHAs or if it is bots exploiting a weakness in Mollom.

Either way I think this is a problem that needs to be sorted. No I don’t have any suggestions for solving it, I am busy solving other issues - so please don’t label me an OSDB. Well given only the Mollon client is FOSS and I suspect the problem is in the (proprietary) backend, I can duck that accusation :)