Hi,
I think I've come across a bug when starting Launchpad trough Alfred.
If I start Launchpad trough Alfred, I'm unable to type in the search box or using the Esc key to quit Launchpad. If I start Launchpad from the Applications folder, everything works fine. I'm able to reproduce the issue every time.
I don't use Launchpad (obviously, I use Alfred) but I came across this bug and I thought it would be helpful to report.
I'm using Alfred 2.6 (374) and Mac OS 10.10.2.