Bug tracker
From Retro CDN
Contents
Sonic Retro
Extension:UploadLocal
Missing or broken.
Sega Retro
NEC Retro
CSS
The style sheets were never fully ironed out for NEC Retro - galleries have black backgrounds, and some line breaks are being ignored (example). The latter might be a template issue but it also highlights differing font sizes.
Retro CDN
All or multiple wikis
Extension:PdfHandler
Thumbnails are no longer generated.
Extension:ReplaceText
No longer works.
Categories
Files aren't added to categories unless edited/poked. As such, files uploaded via UploadLocal have the appearance of being uncategorised.