While looking around for license for the free dictionary I found this
http://i18n.kde.org/doc/doc-primer/licenses.html
It's a very nice license based on GFDL but still GPL compatible
avoiding both the various problems of GPL and GFDL.
It's used by kde for their docs and it's even accepted by the debian people;)

personaly I made that into my preferanble license and I highly recommand it:)

Ely

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