sites/default/files/playlists does not exist, or is not writeable.
warning: fopen(sites/default/files/playlists/b917138742af0ecd6cc1c8aa23dec9ab.xml) [function.fopen]: failed to open stream: Permission denied in /var/www/sites/default/modules/swftools/swftools.module on line 963.
An error occurred trying to create file sites/default/files/playlists/b917138742af0ecd6cc1c8aa23dec9ab.xml.
Unable to create playlist.
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