The media upload icons disappear after returning to a draft for contribs (bug??)

I think I may have found a bug…

I’ve modified the “contributor” role to allow “upload files” using one of the popular capability managers…

So now, when a contributor makes a new post, he’ll have the four icons just above the edit box that allows the user to upload media… The box works fine when the contributor creates a brand new post…

But when the contributor saves a draft, then returns to it later, those upload buttons are no longer there. They are gone!

Is this a bug with WordPress, or a bug with the “Capability Manager” plugin?

Thanks!