Originally Posted by CDFS
If you use an external upload site and use the [img][/img] tags the image will not be uploaded to this site.
Not any more; I just tested it.
What you describe used to be the case (whether using HTML or BBCode to link to the pic source), but this seems to have changed recently.
Now - if you forget to unclick the Import Images box below the reply box - if you use the IMG tags a dialog pops up asking you to accept the SF policy on importing images (if you click cancel the post doesn't submit at all) and if you use HTML, it automatically imports the image without even the prompting dialog box. I suppose at least the dialog box when you use IMG tags forces you to remember to uncheck the Import Images box, so I'm very grateful to you for pointing out this workaround.
Still, I would prefer it if I could just change the default setting for the Import Images function to unchecked, through a general preferences setting.
(for reference, I'm using Win7 & FF17.0. I'm also running some other extensions on the site to modify its appearance and layout, but I don't think any of those can be interefering with this particular functionality. I noticed the change after upgrading to FF17.0, if that helps, but that might just be coincidence.).