I just edited the bit on GPL/LGPL. I took out two paragraphs about how authors should license their works (since this is the FAQ for outside *reusers*) and rewrote the rest as follows:
==== GNU GPL and LGPL
The GNU General Public License (GPL) and Lesser General Public License (LGPL) are computer software licenses and are not usually used for text or media. However, some content on Commons (e.g. icons or screenshots from computer programs) is under the GPL or LGPL.
For simple redistribution of such material, including altered versions, (a) release your version under the same license (b) supply the source version, i.e. something as editable as what you started with (e.g. image file, GIMP .xcf file, etc.).
Note that the GNU General Public License (GPL) and the GNU Free Document License (GFDL) are not compatible with each other. That means that content licensed under the GFDL as well as content licensed under the GPL can't be used together simultaneously in the same "work" — e.g. GPL computer program source embedded in GFDL explicatory text. However, a GPL image in a GFDL text page is usually regarded as an aggregation of two works rather than a single work. ====
Could the professionally legally querulous please comment on this? It's grossly simplified, but is it likely to mislead?
- d.