What you were doing when the issue happenedAlmost every time the window is brought up using the keyboard shotcut
Whether you were able to replicate it a second time by performing the same actionYes
Include any screenshots that might help us
Include the Alfred version & build number you are using2.4 (279)
Include your OS X version10.9.4
Alfred's performance has been extremely poor since the 2.4 update. Bringing up the window using the keyboard shortcut and typing to find an app. The app will show the first letter being typed, then pause and seem to freeze, then suddenly catch up. Disabling Contact Search seems to fix the issue.