# v11: tRPC server returns non-superjson error responses causing client 'Unable to transform response from server'
Feat: Support for other `Content-Types`
enhancementblockedstale
bug: GET requests should not include the Content-Type request header
🐛 bug: unconfirmed
feat: Add support for HTTP status 422 (Unprocessable Content)
✅ accepted-PRs-welcome
bug: trpc doesn't assume `content-type` json anymore
🐛 bug@trpc/server
bug: custom classes violated during `httpBatchStreamLink` encoding
🐛 bug: unconfirmed