Peace to you all,
Being the author of the site that contains the image mentioned, I'd like to thank those of you who sent me an email on the topic. One of you gave me the address of this BB and I read the other comments. Please give me the opportunity to clarify, so kindly consider the following:
1. The portrait wasn't made to offend or harm anyone. I do highly respect Islam, because it contains great wisdom. But please understand I'm not a Muslim. I'm not a religious man at all, though I do respect those who truly believe in God, each in his or her own way.
2. Those who belief that it's forbidden or inappropriate to depict the prophet can remain loyal to their faith by disregarding the image altogether. Others may not share these beliefs though. The image isn't forced on anyone and there's no obligation to accept it as an authentic portrait. Likewise, one who chooses to do so shouldn't be denied the opportunity to examine and appreciate the image.
3. The site has no religious goal. Its purpose is to reconstruct portraits of historic personalities. The images and texts ought to be culturally neutral, though I understand that's not really possible since I'm only human.
To those of you who might have felt offended by the image, I offer my apologies. Now I am even more aware of the sensitivity of the subject, I added a clear warning and statement to the page with the image. Those Muslims who accidentally come across the page, are now advised to completely ignore the image.
I do care about the beliefs of Muslims, but still I have to stay true to my own opinion. To me the image is quite harmless, as it was made neither for worship, nor for insult. Of course, many Muslims won't agree. I understand.
If you believe it's an expression of faith to defend your beloved prophet, you've obviously fulfilled your duty in this matter and I guess it will be appreciated at the end of times.
Thank you for your kind attention.
Peace.