If you need to upgrade a version 2.8.4 WordPress blog to version 2.8.5, and don’t want to upload all the files. I have created a zip file containing only the changed files. I was able to upgrade about 10 blogs in 2 minutes by FTPing the changed files only. There are no database changes, so this upgrade is easy. Click to Download.
Differential Upgrade to WordPress 2.8.5
– October 20, 2009Posted in: Web site
About the Author
David is an IT professional with over 26 years of experience (he started his career as a teenager). He has programmed in more languages and on more types of computers (and similar devices) than he can remember, including TRS-80 Model I Level 2, Commodore Vic-20, C-64 and C-128, Industrial Process Controllers, CP/M machines, and Intel 80x86+ architectures. He currently uses Microsoft .NET Framework tools and SQL Server.
When he's not geeking out, he studies the Martial Art, Aikido; engages in community volunteer work; writes fiction (as well as non-fiction blogs); and does home rennovation work.
He lives in Charlotte NC, USA. 
I haved download your zip, thank alot.