I was using Alfred to eject an external hard drive, but when I begin typing "e" sometimes "ej", the Alfred window freezes before even loading all of the search results. I see the spinning rainbow wheel, and the window remains on top of all other windows. If I click outside of the window, I can use other programs behind the Alfred window (but the window is still covering part of my screen.) The rainbow wheel also appears when I hover over the Alfred menu bar icon. I opened my activity monitor to force quit the process, which clears the window.
HOWEVER, when I go back to my applications folder, I cannot open Alfred again! Finder gives me the error code -600. Underneath "Alfred 2" in my applications folder I saw "Alfred 2 (old version)", which did open successfully, after which I downloaded the newest update again. In trying to replicate the issue after reinstalling this update and everything happened exactly as I described the first time.
Since I've upgraded to Alfred version 2, I've noticed that there can be a significant delay when starting an Alfred search as I hear my external hard drives wake up when I call up Alfred, but it has never frozen like this until just recently.
I was running Alfred v2.0.3 (187) and Mac OS X 10.8.3. I have a screenshot of the window before I forced it to quit, but I wasn't sure how to upload it here.
UPDATE: after posting this, I realized that I am getting the same message when trying to open either version of Alfred 2 that I seem to have in my applications folder.