There have been a few people having issues, but only with the UO Classic theme. I know myself and a few others of us on staff had brought up several months ago that at some point the UO Classic theme was going to become buggy and unsustainable simply because of how it was created. It appear that it's starting to get closer to that point where it will break permanently.
Now we have tried to create some decent alternatives, we've added a new theme which we can maintain using the same colors, and tried to make it look as similar as possible, and I know it wouldn't be "the same", but there really isn't much we can do for UO Classic at this point.
Here's a screenshot of the theme I'm talking about.
View attachment 39556