Flex Viewer 3.1 performance very slow after upgrade

I was running 3.0 ArcGIS Viewer for Flex - Application Builder and performance was great. After upgrading to 3.1 the performance of ArcGIS Viewer for Flex - Application Builder has slowed to a crawl. The performance is so slow it limits any productivity. Creating and managing a new application takes 5x -10x longer necessary.

I should add the performance over the web to my external users is great. It is the application builder interface that is lethargic.

Any ideas?

Thank you,

mark C>