Can't click the LAUNCH button
After the Kalista patch or so, I noticed a UI bug in the patcher. About 50% of the time, when I try to click the big LAUNCH button to launch the League of Legends client, nothing happens. Neither can I click any of the other buttons.
As a mitigation, I can finally click the Launch button after force-quitting and restarting the patcher several times.
I'm using Mac OS X 10.10.1 Yosemite on a 13" mid-2013 MacBook Air, Intel Haswell Core i7.