Every time I have tried to activate Jetpack in the past 48 hours, it has crashed my entire admin panel. All I can see is a white blank screen, and it's forced me to uninstall and reinstall WordPress on my server several times. I've also tried this on WP version 3.4.2 and 3.4.1, and i've tried updating the Jetpack plugin, and not. Every time, as soon as I hit the activation button, my site is completely totaled.
I have another site on the same server (different directory) that has never encountered any problems like this. What is going on?