Picture attachment question

[Jim Goose]

Hi guys/ gals (?)

Question about pictures.

Posted a picture in a thread but silly me forgot to blot out the rego number.
I cant edit the post as there appears to be a very short window to do so before the "edit" button dissappears!

I deleted the picture from my photobucket album thinking the picture would dissappear from the post, but it hasnt?!!

I uploaded a modified picture with the rego blotted out, but the orginal picture is still showing..

Does the forum hold these pictures in some sort of cache??? I though that pictures which are linked externally remain external ???