As a follow-up… I double-checked my log files this morning. Much to my dismay, the most important installation still has that error occurring every few minutes.
There are two major differences between other installations and this one:
- This server is a “Networked” or “Multisite” environment.
- This server is running on Microsoft IIS, not Apache/Linux.
I cannot figure out why your suggestion worked in all other environments, but not the most important one. Is there any chance that you could investigate, or recommend a course of investigation?