grafica.villcom on "[Plugin: Shareaholic | share buttons, related posts, social analytics & more] Internal server error - compatibility problem"

I want to report a bug I found or compatibility problem (I think so) into the last two updates I made on Wordpress 3.6.1.
With the first update all was ok until you publish posts: with "publish" or "update" you get an Internal server error.
Instead updating to the latest version of the plugin I can't even activate the plugin so I can't use the plugin anymore.
Any idea about this problem?

https://wordpress.org/plugins/shareaholic/