I am getting an intermittent EE error when using the search. The error says “The action you have requested is invalid.” I don’t have a 100% repeatable way of triggering it, but it usually comes up after doing several searches in a row (searching, and then using the same sidebar search box from the results page). I have only seen it come up using Chrome and IE 9. I have not noticed it coming up in Firefox or Safari (that I can remember at least).
You can try it here. It is the search that it is in the right sidebar.
http://www.lancope.com/blog/