I have the vista za beta.
When I double click on my ie icon, the icon is highlighted and the charming little swirling vortex thing rotates for a while ...then it stops....ie doesn't open.
If I click on a shortcut to a web page....after about 20 seconds the page opens. With that page open I can minimize it, click on my ie icon and
ie opens immediately.
With za disabled the problem is gone.
This began about 3 days ago after running the za vista beta without problems for a week.