Please describe the problem:
In the "Save as JPEG" options dialog, the user can select
the Subsampling factor. I have selected "1x1,1x1,1x1 (best quality)"
and then clicked on the "Save Defaults" button to set this as the future
default.
When opening GIMP the next time and creating a new image from scratch,
the dropdown field is BLANK (instead of displaying "1x1,1x1,1x1 (best
quality)").

It seems that GIMP then uses its "normal default" 2x1,1x1,1x1 (4:2:2)
when saving the image.

Steps to reproduce:
1. Save an image as JPEG
2. In the JPEG Options dialog, select Subsampling: "1x1,1x1,1x1 (best quality)"
3. Click "Save Defaults"
4. Close GIMP
5. Reopen GIMP
6. Start a new image using any Template
7. Save as JPEG
8. In the dialog, the Subsampling dropdown box is EMPTY (i.e. blank)


Actual results:
see above

Expected results:
The Subsampling factor should be remembered

Does this happen every time?
when creating a new image, yes.


Other information:
I'm using Gimp 2.6 for WINDOWS (!!!) not sure if this happens in the
Linux version as well