Unfortunately, I don't see how that could help. It looks like the error is with the code that sends email reports, right? To test properly with a new piwik version, we would need to run the archive script with the new code and the live production data. There would be risks of sending double email reports to clients, etc. I would like to help test it, but I just don't think we can in a production environment.
Anything else less drastic I could try? If you know specifically which code might fix this and could point me to the files and lines that changed, and if the changes are few enough, I could possible test those specific changes in production.
Anything else less drastic I could try? If you know specifically which code might fix this and could point me to the files and lines that changed, and if the changes are few enough, I could possible test those specific changes in production.