I have sometimes not been able to see pictures. First I thougth it was bad linked, but from the comments I can see it is shown on others systems.
The problem is the format. I use a Mac and .bmp not only take more space than .jpg or .gif it is a Window "native" format. I think most of you may use Windows, but beware it is other systems around, so please try to avoid .bmp and go for .jpg or .gif, which formats I do not know any system having problem with.