I would like to inform the WPMU users about a strange behavior that drove me crazy some days ago.Upgrading from previous versions to the 2.7.1 version, we got strange random errors, some kind of random “hang on” in the wpmu blogs network.After digging for a while, we found this bug:http://core.trac.wordpress.org/ticket/8590The problem totally went away installing php5-curl package, on my debian servers:
apt-get install php5-curl ;/etc/init.d/apache2 restart
Hope this can help
Fabulous Mindset 