the WP tracking has crashed 100 websites this morning
Could you give me more details about this issue? By looking at one of the 100 sites' server error logs, you might be able to learn more about what caused it to crash.
Could you also let me know if the error comes back when reinstalling the latest, unmodified version of Jetpack?
It might also help if you could let me know the URL of one of the sites that crashed, so I can test your Jetpack connection once Jetpack is installed again.
If you want the site URL to remain private, you can also contact us via this contact form:
http://jetpack.me/contact-support/