I have the kodak program and reduce mine on there and have had no problem posting them on here. Here's what I do:
I go to edit, crop the picture some, then click on the "save as" link and a once you rename the picture there should be another option on what you want to save the picture as, it should list, best for email, best for web etc, I click "best for web" and it resizes the picture then once I get back into this page I click the attachment link, click browse and upload from my recent documents.
Hope this helps, if not PM..