Some of you may have noticed the above message appearing where my recent posts should have been for the last week or two. It turns out the “Post-Plugin Library missing” message can be fixed by downloading the latest copy of the Post-Plugin Library (shocking, I know).
I can’t remember if I upgraded WordPress or the Recent Posts plugin or both, but I’m guessing it was an upgrade to the Recent Post plugin that caused the problem.
The new version requires a “Post-Plugin library” (written by the same guy).
I found the link on my WordPress Admin Plugins page in the description of the Recent Posts plugin as part of a message telling me the plugin:
Requires the latest version of the Post-Plugin Library to be installed
Oops. Apparently I didn’t have any version of the Post-Plugin library and: