Sebastien, I think this may be related to the patch applied to fix Bug #1085320: the Gnome folks have since reverted (at least parts of) it (see Gnome bug 688808 [1]) because it caused custom icons to be shown as thumbnails, hence the borders reported in this LP bug. I tested this by applying the changes in [2] to current Nautilus in Raring (1:3.6.3-0ubuntu16), and the borders around my customized icons went away. Also, though I didn't test very extensively, this didn't result in desktop files again having borders as originally reported in #1085320.
(The commit log entry of [2] refers to [3], but I think it should refer to [4] instead.)
Sebastien, I think this may be related to the patch applied to fix Bug #1085320: the Gnome folks have since reverted (at least parts of) it (see Gnome bug 688808 [1]) because it caused custom icons to be shown as thumbnails, hence the borders reported in this LP bug. I tested this by applying the changes in [2] to current Nautilus in Raring (1:3.6. 3-0ubuntu16) , and the borders around my customized icons went away. Also, though I didn't test very extensively, this didn't result in desktop files again having borders as originally reported in #1085320.
(The commit log entry of [2] refers to [3], but I think it should refer to [4] instead.)
*[1] https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 688808# short_desc_ nonedit_ display /git.gnome. org/browse/ nautilus/ commit/ ?h=gnome- 3-6& id=f69e472263b0 bf6e1cc60c0eeaf 7874fc7931f8d /git.gnome. org/browse/ nautilus/ commit/ ?id=d9ef715ea11 e92917414d5d7bd dd4dd1487fac1b /git.gnome. org/browse/ nautilus/ commit/ ?h=gnome- 3-6& id=6cde4c5a6d63 9c85df09b8992a3 07f91d6b056a6
*[2] https:/
*[3] https:/
*[4] https:/