I compiled my own build to get those WPS to work but it still fails.
I now can use other WPS with Album Art and resize like the slant WPS that it quite cool but doesn't support Asian languages (and if I replace the font by a unicode font, of course the WPS is not nice to look at then because the text doesn't fit anymore).
Here is what I get with my build and slant :

And with AABox :

You can compare with the original WPS look at this page of the Wiki (and DL those WPS) :
http://www.rockbox-themes.org/index.php?res=240x320x16These are the details about my build :
http://forums.rockbox.org/index.php?topic=13073.msg98709#newBut I get the same bad WPS with other recent unsupported builds for the Gigabeat.
What is going wrong ? Is anybody succesfully using any of those WPS with recent builds ?