Pasting images in TinyMCE on rails app

Question

Hi,

I found a weird problem with TinyMCE editor. Copying & pasting images from another domain works fine but if the images are on the same domain the path are relative but not correct sometimes. I figured out that the problem is related to the rails URL scheme.

Example)

Images are copied from http://mydomain.com/index.html page and the real images path is http://mydomain.com/photos/image.jpg.

Editor page:

http://mydomain.com/posts/new => image path is set as ../photos/image.jpg

http://mydomain.com/posts/edit/123 => image path is set as ../../photos/image.jpg

So I tried http://mydomain.com/posts/new/ and it worked.

How do I solve this problem?

Thanks.

Sam