I will repost the issues I've seen with the Windows 95 theme, as well as add some new ones here.
There is a background-colored bar at the top where there usually is a top bar in other themes.
When I switched the theme, the posts were jittering up and down by a pixel but refreshing it fixed that, wonder what was up with that.
Also, clicking on someone's ID or replying to their post turns their posts lime, probably a leftover from another theme. It should turn the dark gray from the top bar into a Win95 blue. And hovering over a quoted post, it doesn't show the top bar. Pic related 1 shows both of these issues.
The ID font is different from the rest of the bar, so the IDs are smaller and uncentered vertically in the top bar.
The refresh button doesn't have color, it's the same color as the background.
While the top (or bottom in this case) bar works fine in threads, it appears at the top and with a double-sized font in the catalog if the window is too small horizontally. I think this is a problem with all themes but is especially noticeable with this one. Pic related 2. The "new thread" and "reply" buttons at the top of the catalog and thread stretch out oddly like so, pic related 3. The black text on blue background is hard to read as well.
Lastly, the captcha bar on the Win95 theme is microscopic. Pic related 4. Took me a few moments to find it. Clearly not intended.
And when I switch a theme, it only applies to one board instead of the whole site in general. Is that intended behavior? Especially on a board like this with no custom CSS.