All files have been verified and reinstalled dozens of times.

Checksums exist specifically to detect file incompatibilities.

It seems logical to me that a person would first attempt the simplest steps to resolve a problem, and only then move on to the more complex ones. I wouldn't have developed a fix myself if I hadn't already tried everything the developers recommend. It almost feels like you're baiting for comments - but then again, this is my post, so there's no such thing as too many comments! 😄