I don't use a lot of uppercase only, although will occasionally use it to highlight certain items. The first time I noticed the issue was this afternoon on BikeForums (some word processors will do autocorrect of capital issues, although one can usually work around it).
And, of course, abbreviations. EPS, OK, etc.
I sent myself an E-Mail, and it was fine.
I haven't posted on many other forums lately. But, I am a member on a couple of other forums, and I'll see if they're experiencing the issue. But, it would be an interesting coincidence that the issue cropped up the day of the update.
I am often a bit wordy, but this struck me with one of my rare very short quote replies.