Had a look at those, fixed avatars on media pages and medal spacing, the staff doesn't really want to change user colors, the rest is more trouble than it's worth due to how the theme system is designed. If by "length of the banner", you mean stretching it along the screen, I guess it'd severely distort the banner.Alright, I'll just edit this post with any issues I run into.
- A minor alignment issue that might not be an issue but there you go.
- The CSS for Avatar placement on Media comment pages is a little wonky. (Update: They're wonky in any Comment Page)
- Spacing for Medals sometimes overlaps with larger flags.
- The small icon indicating whether you have posted in a thread cuts off just short of its right dimensions.
- The Width Change option doesn't also change the length of the banner.
- Global Mod blue is still nearly unreadable on darker themes.
- Little weird header class thing I found under Account Details.
- Emoji Tab Menus aren't very visible on dark themes.