The wiki knows about bugs and their fixes in 1.4.10. Usually it covers small patches which fix problems discovered after the release.

But more interesting for the future is the section about patches for the current release.

• mod_deflate for compressing dynamic content
• mod_extforward to extract the Host from X-forwarded-for
• the mysqlvhost patches for mod_fastcgi

They will be check in the next ‘feature’ release. If you want to try them out now and test them, feel free to contact the authors of the patches directly.