UC 18.104.22.1684. I've been running a VERY old version (5.x) of UC for a number of years, but was able to persuade my employer to update both my UC and UE to current versions
I never had a problem before, but I noticed just now when I used it on my XP Pro machine, it was also not showing the differences in red. In fact, it wasn't showing ANY
differences, zero, although I could clearly see a major difference right in the 3rd line or so of the 12 or 15 lines in each small file. I thought maybe I'd fubar'd my colors, as I'd been trying some of them, but nothing worked. I set them back to default, and despite a refresh, go, etc, this did not correct the problem either, still no compare. As a test, I created two small files in UE, and did a highlighted line compare. It worked, rather to my surprise. I tried my original two files, and it initially didn't work either, but then all of a sudden it did.
And now, after changing the color scheme again, I ran another 3-way text compare, and files 1 and 2 are still showing the default colors, and file 3 has my new ones. Refreshing made them all the same again, but when I exited and came back in again, same thing! 1 & 2 in default colors, 3 in my color. Weird.
While I'm glad it's working now, I'm quite mystified as to why it wasn't running a compare at all, and I'm hoping that it won't revert. Any ideas anyone?