Where do images of Skype contacts get cached on the N900, if at all?

The contact's profile image will automatically get loaded to the N900 from Skype, but it will also disappear apparently after some amount of time (perhaps if that contact has not logged in for a certain duration, as I can see that the person still has the image set when I login to my PC skype client). I'm trying to figure out if that skype image ever gets stored to the N900 and if I can manually set it in the Contact's profile page.

I know skype will always want to override it automatically, but that's ok. I'm just trying to avoid the generic contact image from showing up on my desktop when this happens.

Searched all my image locations (DCIM, images, and different directories beneath /home but no luck in identifying where it might get cached. Searched but also haven't found a TMO thread that discusses it.