• Fix Basic Transformer Block by @DN6 in #5683
• [PixArt-Alpha] fix mask_feature so that precomputed embeddings work with a batch size > 1 by @sayakpaul in #5677
• Make sure DDPM and diffusers can be used without Transformers by @sayakpaul in #5668
• [PixArt-Alpha] Support non-square images by @sayakpaul in #5672