id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
12230	Upgrade error - Incompatible Archive - ZipArchive	WraithKenny	dd32	"Upgrading to 3.0.alpha breaks upgrader, gets the message:

{{{
Downloading update from http://wordpress.org/nightly-builds/wordpress-latest.zip…

Unpacking the update…

Incompatible Archive.

Installation Failed
}}}

Started from a new install of 2.9.1 with a fresh database. Uploaded over FTP, ran install. Installed Beta Tester plugin. Put on Nightly branch, then upgraded. Immediately tried to upgrade and got error message. No error logs. Runs on RackSpaceCloud, if that matters.

possibly related to #10403 ?"	defect (bug)	closed	normal	3.0	Upgrade/Install	3.0	normal	fixed		WraithKenny