Photo URL change?

[ofly222]

Hi!

I would like to change the URL field of a photo stored in my album.
If I try this in my app
( photo.setField(opensocial.MediaItem.Field.URL, "http://......./
a.jpg")), then it works fine, when I click on the original thumbnail
in my app, I see the changed photo.

But.
As I check it in my albums (also in sandbox, but in my profile), when
I click on the thumbnail, the original picture is shown.

Is that a bug, or it's because I haven't published my application yet
(and my app works only on a temporary copy of my profile)?

Could you tell me how to change the big photo behind thumbnail, if I
can't do it with URL-change? My aim is: only the new picture is
available, the old doesn't.

Thank for answer.

[ofly222]

Anybody?
It would be really important, I have to say something to my boss.
THx.