The video in question that he posted, kinda silly, but has caused riots all over the Middle East.
According to the article:
Free speech doesn't fly in Egypt either apparently.Alber Saber was arrested on Friday after his mother called the police out of fear of the crowd outside their home. Saber was arrested under the rarely used law that prohibits insulting religion
A Facebook page has been created in support of freeing him, I don't know how much good it will do but go click the "like" button if you have time.