Any images of the Prophet are banned under Islamic tradition.
I could see such an arrest if there were, indeed, a law against it. But being arrested for breaking a tradition? Is that comparable to those of us in the United States saying "Happy Holidays" now instead of "Merry Christmas"?
The editors are named Jihad Momani and Hisham Khalidi. Mr. Momani published three of the cartoons next to an editorial. According to the story:
Mr Momani's paper, Shihan, had printed three of the cartoons, alongside an editorial questioning whether the angry reaction to them in the Muslim world was justified.
"Muslims of the world be reasonable," wrote Mr Momani.
Apparently they aren't.