Need help posting pictures /images

Hi, I work from a macbook and I use picassa web albums for posting pictures to the site. I never had a problem when I used a pc but since switching to the mac when I try to upload the pictures all I get is a little blue question mark as a thumbnail.

If I control + click I can open in new tab or window, or download image, all of which will allow me to go to the site and see the image but this doesn't always seem to work for other people.

Does anyone have any ideas? Thanks

pictures are posted here

http://www.babyandbump.com/pregnanc...y-leos-starting-her-pride-12.html#post1906333

 

Managed to post through attachment (paperclip) rather than the insert image (mountain) icon !