There is a pretty bad issue right now with your WPMU Dashboard (updates) plugin that you might already be aware of.
The RSS Feed is not working (which I really dont mind) but this is really putting a hit on page load time on the dashboard. Like, seriously, takes 10 plus seconds before my dashboard will load.
Deactivating the plugin obviously fixes the page load problem but the RSS feed issue needs to be fixed so we can have this plugin activated again. This is happening on ALL my sites with the plugin installed so its not a compatibility issue and has just started happening today. Thanks