I am experiencing an error when trying to upgrade from 3.5 to 3.5.1 on a Windows server. Here are the error messages:
Downloading update from http://wordpress.org/wordpress-3.5.1-partial-0.zip…
Unpacking the update…
The package could not be installed.: PCLZIP_ERR_MISSING_FILE (-4) : Missing archive file 'C:\WINDOWS\TEMP/wordpress-3.tmp'
Note the wrong (for Windows) forward-facing '/' before 'wordpress-3.tmp'. Is this the cause of the problem? If so, please fix Woprdpress team! The problem also affects plugin upgrades.
Many thanks, Anthony