Upgrading from 2.5.0 to 2.5.2 error

I've got a fresh install of hotstart2.5 and I want to update it to the latest 2.5.2 release of joomla, but I run into these errors and am unable to continue.

Unable to read archive (zip)
Update path does not exist
JInstaller: :Install: Cannot find XML setup file
Unable to detect manifest file

Please tell me how to sort this out

Ok, updated manually and all fine. This should probably be addressed by you guys though.

For others who will run into the same problem:

Download your upgrade package here:
joomlacode.org/gf/project/joomla/frs/?ac...&frs_package_id=6296


Then go here and follow the step-by-step instructions on manual install:
(Moving the contents of your upgrade package by ftp to your server will not do! There's more to it!)

docs.joomla.org/Upgrading_from_an_existing_version