there were some issues with the blend 2 august preview tool when used with the silverlight 1.1 alpha refresh-refresh :-). you could probably see some issues on the forum or if you launched blend 2 and didn't have the .net project types, you were probably frustrated to.
in case you haven't heard, i thought it was valid to repeat the echo here on my blog. the blend guys have refreshed their build to help alleviate this. i guess it should be called blend 2 august preview refresh edition? anyway, you can download the update here.