[Raytestrak]

no clue why that's happening.
xbmc really needs only one.
once a .dds version is created, it should use it one instead of the .tbn.

I thought so too, but when I remove the ,tbn, I lose my fanart. And when I re-download fanart, it recreates the .tbn. When I add a new movie, it first downloads a .tbn and creates the .dds when xbmc loads the .tbn.

If I remove the <useddsfanart>true</useddsfanart> from my advancedsettings.xml, the performance drops instantly, so it seems to be using it.

Thanks for the info, I'll try some more stuff out.

Edit:

I've tried some stuff out

I don't know if it's suppose to work like this or that I have a quirky set-up. But ... If I remove a .tbn file, I lose the fanart. XBMC will generate a new .tbn and the fanart is back. The funny thing is: when I open the .tbn, it's (or it can be) a different image than it was before, but the fanart in xbmc is still the same. To me that's proof that the .dds is loadded even though both files are present and I loose fanart when I remove the .tbn.

xbmc checks the presence of a .dds file when accessing the the image, so it tries to load the .tbn, sees a .dds with the same name and loads that instead.

Found a wiki article that supports this:

http://wiki.xbmc.org/index.php?title=ThumbnailCache

Only strange thing is that when I export my video library, it's exports .tbn files only (but that also kinda fits my above hypothesis).