Cover art location

[stallmen]

I have most of my music stored in Album - Artist folders with the tracks inside and a folder.jpg for cover art. However on albums that have more than one disc there are CD1, CD2 etc folders underneath. I put my folder.jpg in the parent folder so I don't have to have duplicates in every CD1, CD2 etc folder but Subsonic seems to ignore it if it's done that way. I've tried putting ..\folder.jpg in the cover art mask but it doesn't seem to have any effect. Is there any way to modify the source so that it always looks in the parent folder for cover art?