Recently there have been some registered user accounts which have been used to post spam on the site using automated methods. For the time being I have enabled "captcha" image verification for comment posting. I know this will be inconvenient for the regular posters here, and I intend to look into alternatives or ways to whitelist some of the more regular commenters.
In the meantime, please keep an eye out for these spam posts (they will be obvious, usually containing dozens of links to other sites) and let us know when you come across them. Thanks!
