Patrick has decided to reduce the maintenance load by EOL'ing Slackware 12.* (12.1 and 12.2) which has been maintained over 5 years old this year. The decision is not announced explicitly, but it was noticed by one member of LQ and posted it on LQ.
This mean, by next year, the only supported Slackware version is Slackware 13.0, 13.1, 13.37, 14.0, and of course 14.1, the latest -Stable which should be released this year. Considering that this maintenance process was handled single-handed by Patrick himself, it was still considered an amazing process since not many other distribution supported more than five years. Even Ubuntu just lifted their life span of their server version to 5 years recently, while Slackware has been doing this for years.
For those who are still running Slackware 12.1 and 12.2, please be advised and start your planning to upgrade to newer Slackware version. You can use slackpkg to help you to upgrade to the next version safely. Just be sure to read the ChangeLog and CHANGES_AND_HINTS documentations before upgrading to make sure you have noted added/removed packages on the new version.