[SickIcarus]

Thumbs are stored on an smb share.
File structure is:
\Tv Episodes\<tv show>\<files>
Poster.jpg and banner.jpg are present in each show's folder.

Library was recently recreated, with source option checked to prefer posters.
In a banner-type view, the poster image is stretched to banner proportions. When i check the option in view settings to use banner.jpg, no image is loaded.

In a poster-type view, the thumb is displayed properly. When use poster.jpg is checked, no image loads.

Debug log: http://xbmclogs.com/show.php?id=9554

[BigNoid]

The skin tries to load them, but cannot find the poster.jpg in the given path. Most likely due to lack of rights. Make sure you have a passwords.xml for your samba shares to avoid problems like these as explained on the bottom of this page.

[SickIcarus]

Got it, that makes sense, thank you!
I'll set up a passwords.xml file here later this morning after i've woken up a bit, and will edit this post with the results.

Edit: and that cleared it right up, thanks!