Yes, the site logo changed. This is because site stylesheets are all brand-spanking new, and we have 15 new themes for you to choose from! More info here.
Policy Update - Rules changes incoming for AI content - Read Here

Source changes for image #1185167

ImageSourceActionTimestampUser
1185167
Size: 4450x1000 | Tagged: safe, artist:kianamai, applejack, fluttershy, pinkie pie, rainbow dash, rarity, twilight sparkle, alicorn, pony, g4, alternate design, diverse body types, mane six, redesign, simple background, transparent background, twilight sparkle (alicorn), vector
http://www.deviantart.com/art/mane-6-617162367Removed Crowley
1185167
Size: 4450x1000 | Tagged: safe, artist:kianamai, applejack, fluttershy, pinkie pie, rainbow dash, rarity, twilight sparkle, alicorn, pony, g4, alternate design, diverse body types, mane six, redesign, simple background, transparent background, twilight sparkle (alicorn), vector
http://kilala97.deviantart.com/art/Mane-6-617162367Added DragonMaus